> Full-text translation from Chinese. The original remains authoritative for its research claims; this translation is not independent mathematical verification.

# NIOT-07 — Bidirectional Structural Localization and Responsibility Closure: A Generalized Information Theory of BCODR

## Bidirectional Structural Localization and Responsibility Closure: A Generalized Information-Theoretic Form of BCODR

**Series:** Numerical Information Object Theory (NIOT) / Numerical Information Object Theory  
**Paper:** Paper 07  
**Author:** Neo.K  
**Institution:** EveMissLab / 一言諾科技有限公司  
**Version:** v0.1  
**Date:** 2026-09-22  
**Document type:** Bidirectional Localization / Responsibility Closure / BCODR Generalization Paper  
**Prerequisites:** NIOT-00 through 06; BCODR v0.1; the BCODR-LUC series  
**Related theories:** UEFM, Probe Calculus, Spectral Coupling, AIC, ISQL, CAIR, SEDB  
**Status:** DRAFT / GENERALIZED-BCODR / RESPONSIBILITY-CLOSURE FOUNDATION  
**Canonical Source:** UTF-8 Markdown  
**Mathematical source conventions:** Inline math uses only `$...$`, and display math uses only `$$...$$`

---

# Abstract

The original BCODR method centers on bidirectional structural expansion, overlap, atomic decomposition, responsibility separation, and a surviving spine. It was first used in geometric proof spaces and local certificate analyses related to the Lebesgue Universal Cover. The BCODR-LUC series further revealed that bidirectional coverage within the same container is not the same as a common point; proximity at the point level does not mean the same structural mechanism. Candidate points, seeds, germs, certificate interactions, and minimizers must be strictly distinguished.

This paper elevates BCODR from a particular geometric method to a general information-localization architecture within NIOT:

$$
\boxed{
\text{Bidirectional Structural Localization and Responsibility Closure}
}
$$

Its core is not "drawing two circles and finding their intersection," but:

$$
\boxed{
\text{expanding from two opposing or complementary information directions
to find the local structures that genuinely bear responsibility for unresolved problems.}
}
$$

Define two directional fields:

$$
\mathcal F^+,
\qquad
\mathcal F^-,
$$

They may represent candidate / certificate, generation / reconstruction, support / exclusion, source / target, hypothesis / falsifier, and other roles. Bidirectional overlap is:

$$
\boxed{
\mathcal O
=
\mathcal F^+
\cap
\mathcal F^-.
}
$$

Yet this paper retains the central safeguard of BCODR-LUC:

$$
\boxed{
\text{container overlap}
\neq
\text{point alignment}
\neq
\text{seed alignment}
\neq
\text{structural alignment}.
}
$$

Thus overlap is not a conclusion, but the starting point of responsibility localization.

This paper further defines responsibility cells, responsibility signatures, atomic overlap decomposition, responsibility graphs, bidirectional frontiers, responsibility fibers, structural-alignment tests, closure certificates, and surviving responsibility spines. For a task $\mathcal T$, if all task-critical responsibilities are proved, excluded, localized, or explicitly retained as finitely many unresolved nodes, write:

$$
\boxed{
\operatorname{Close}^{R}_{\mathcal T}=1.
}
$$

The final claim of this paper is:

$$
\boxed{
\text{The essence of BCODR is not finding an answer,
but compressing vast search/proof spaces into finite, traceable, verifiable responsibility spines.}
}
$$

**Keywords:** BCODR, Bidirectional Structural Localization, Responsibility Closure, Structural Alignment, Atomic Overlap, Surviving Spine, Certificates, Probes, UEFM, NIOT

---

# 1. From BCODR to General Information Localization

The original BCODR form handles two directions:

$$
\mathcal C^+,
\qquad
\mathcal C^-.
$$

Within NIOT, define more generally:

$$
\boxed{
\mathcal F^+
=
\operatorname{Expand}^+(\mathfrak N,\mathcal T),
}
$$

$$
\boxed{
\mathcal F^-
=
\operatorname{Expand}^-(\mathfrak N,\mathcal T).
}
$$

The two directions may respectively be:

```text
candidate      / certificate
support        / exclusion
generation     / reconstruction
forward        / backward
source         / target
claim          / falsifier
prediction     / observation
construction   / obstruction
```

Thus `$+$` and `$-$` are not positive and negative numerical values, but relative directional semantics.

---

# 2. Direction Schema

Define:

$$
\boxed{
\Sigma_D
=
\langle
D^+,D^-,
\operatorname{Role}^+,
\operatorname{Role}^-
\rangle.
}
$$

Every BCODR-style analysis must declare:

1. what each direction represents;
2. which data may enter;
3. which conclusions the overlap can support;
4. which conclusions do not follow from the overlap.

If the two fields are not comparable responsibility fields, then:

$$
\boxed{
\text{geometric intersection}
\not\Rightarrow
\text{semantic overlap}.
}
$$

---

# 3. Responsibility Space

For a task $\mathcal T$, define:

$$
\boxed{
\mathcal R_{\mathcal T}
}
$$

as the responsibility space.

Each:

$$
r\in\mathcal R_{\mathcal T}
$$

denotes a structural unit that may still be responsible for:

- the task outcome;
- a proof obligation;
- an error source;
- a candidate mechanism;
- a cause of failure;

as listed above.

A responsibility object is:

$$
\boxed{
\mathfrak R
=
\langle
id,
role,
source,
target,
state,
provenance,
certificate,
dependencies
\rangle.
}
$$

Initial states:

```text
OPEN
SUPPORTED
EXCLUDED
FALSIFIED
CERTIFIED
PENDING_COMPUTE
PENDING_VERIFY
WITHHELD
REVOKED
CLOSED
```

Responsibility is not truth. It denotes:

$$
\boxed{
\text{a structural position that needs to be addressed.}
}
$$

---

# 4. Bidirectional Fields

Forward and backward fields may be written as:

$$
\mathcal F^+:
\mathcal R
\rightarrow
[0,\infty]\cup\{\infty\},
$$

$$
\mathcal F^-:
\mathcal R
\rightarrow
[0,\infty]\cup\{\infty\}.
$$

In a cost / arrival model, they respectively represent the costs for a forward source and backward certificate to reach a responsibility node.

If:

$$
\mathcal F^+(r^\star)
=
\mathcal F^-(r^\star),
$$

call $r^\star$ a balanced responsibility point, and define:

$$
\boxed{
T^\star
=
\mathcal F^+(r^\star)
=
\mathcal F^-(r^\star).
}
$$

However:

$$
\boxed{
\text{balanced point}
\neq
\text{solution}
}
$$

holds generally.

---

# 5. First Overlap

For a threshold $T$:

$$
\boxed{
\mathcal O_T
=
\{
r:
\mathcal F^+(r)\le T
\land
\mathcal F^-(r)\le T
\}.
}
$$

Define the first-overlap time:

$$
\boxed{
T^\star
=
\inf
\{
T:
\mathcal O_T\neq\varnothing
\}.
}
$$

and:

$$
\boxed{
\mathcal O^\star
=
\mathcal O_{T^\star}.
}
$$

First overlap means only that the two responsibility fields have become jointly reachable for the first time; it does not automatically establish an answer, optimum, or mechanism identity.

---

# 6. Container Overlap and True Common-Point Overlap

If a container $B$ is reached by both directions:

$$
B\cap\mathcal F^+\neq\varnothing,
$$

$$
B\cap\mathcal F^-\neq\varnothing,
$$

this does not imply:

$$
\exists r\in B:
r\in\mathcal F^+\cap\mathcal F^-.
$$

Therefore:

$$
\boxed{
\text{container overlap}
\neq
\text{true common-point overlap}.
}
$$

This is one of the most important safeguards in the BCODR-LUC series.

---

# 7. Alignment Hierarchy

## 7.1 Point Alignment

If a candidate $r_c$ satisfies:

$$
\boxed{
r_c=r^\star,
}
$$

this is called point alignment.

This is the strongest alignment and the one least suitable for conjecture without evidence.

## 7.2 Seed Alignment

If a candidate aligns with the same forward seed family $S_+$:

$$
\boxed{
d(r_c,S_+)\le\varepsilon_{\mathrm{seed}},
}
$$

this is called seed alignment.

## 7.3 Structural Alignment

If:

$$
\boxed{
r_c
\sim_{\mathrm{struct}}
S_+,
}
$$

this means that they share:

- a support signature;
- an active contact family;
- a continuation branch;
- topology-wall provenance;
- a responsibility-graph role;
- a certificate-relevant mechanism.

Structural alignment does not require:

$$
r_c=r^\star.
$$

Therefore:

$$
\boxed{
\text{coordinate equality}
\neq
\text{mechanism identity}.
}
$$

---

# 8. Atomic Overlap Decomposition

If an overlap $\mathcal O$ contains different responsibility signatures, it must be decomposed:

$$
\boxed{
\mathcal O
=
\bigsqcup_{\alpha}
\Omega_\alpha.
}
$$

Each atomic cell $\Omega_\alpha$ should be locally stable in:

- forward-source membership;
- backward-certificate membership;
- the active probe set;
- structural role;
- provenance;
- topology class.

Define a responsibility signature:

$$
\boxed{
\sigma_R(\Omega_\alpha)
=
\langle
S^+_\alpha,
S^-_\alpha,
P_\alpha,
T_\alpha,
C_\alpha
\rangle.
}
$$

Atomicity is not an absolute ontology; it is probe-relative. Finer probes may split it further.

---

# 9. Split and Merge

If a new probe finds that a cell's:

$$
\sigma_R
$$

is inconsistent:

$$
\boxed{
\Omega
\rightarrow
\Omega_1
\sqcup
\Omega_2.
}
$$

If two cells have equivalent responsibility signatures for a task $\mathcal T$:

$$
\Omega_1
\sim_{\mathcal T}
\Omega_2,
$$

they may be merged.

Yet merging must be supported by role / provenance / certificates, not performed simply because coordinates are close.

---

# 10. Responsibility Graph

Define:

$$
\boxed{
G_R
=
(V_R,E_R).
}
$$

A node may be:

- a responsibility cell;
- a candidate mechanism;
- a certificate;
- a witness;
- a local germ.

An edge may be:

```text
depends_on
supports
excludes
refines
overlaps
derives_from
mirrors
bridges_to
```

If a responsibility is jointly formed by multiple sources, a hyperedge may be used.

---

# 11. Responsibility Frontier

Define:

$$
\boxed{
F_R
}
$$

as responsibility nodes that are simultaneously:

1. forward-reachable;
2. backward-reachable;
3. not yet closed;
4. task-critical;

as listed above.

The next round's expensive computations act preferentially on:

$$
F_R.
$$

Thus the actual source of BCODR's savings is not the circle kernel, but:

$$
\boxed{
\text{localize responsibility before performing expensive computation.}
}
$$

---

# 12. Global Localization Before Local Calculus

The process after generalizing BCODR should be:

$$
\boxed{
\text{global localization}
\rightarrow
\text{local calculus}.
}
$$

rather than first performing second-order, formalized, or high-precision computation throughout a vast space.

First ask:

> Where does responsibility for unresolved work actually remain?

---

# 13. Germ

At a local responsibility meeting point $r^\star$, define:

$$
\boxed{
\mathcal G(r^\star)
}
$$

as the local germ.

It may contain:

- tangent behavior;
- local stiffness;
- active constraints;
- continuation directions.

However:

$$
\boxed{
\mathcal G(r^\star)
\neq
\text{global optimum}.
}
$$

---

# 14. Germ Stiffness

If local quadratic forms are available:

$$
Q_+,
\qquad
Q_-,
$$

one can define:

$$
\boxed{
\kappa_{\mathrm{germ}}
=
\min_{\|v\|=1}
\max
\{
Q_+(v),
Q_-(v)
\}.
}
$$

If:

$$
\kappa_{\mathrm{germ}}>0,
$$

this means only local second-order isolation.

It does not automatically imply a global minimizer.

---

# 15. Representation Asymmetry and Structural Asymmetry

The BCODR-LUC mirror analysis supplies another important safeguard:

$$
\boxed{
\text{visual asymmetry}
\neq
\text{geometric chirality}.
}
$$

Within NIOT, this generalizes to:

$$
\boxed{
\text{representation asymmetry}
\neq
\text{canonical structural asymmetry}.
}
$$

Two representations that appear different may still lie in the same orbit under an admissible transformation group $G$:

$$
\boxed{
X\sim_GY.
}
$$

---

# 16. Global Symmetry vs Local Chart Symmetry

One must retain:

$$
\boxed{
\text{global covariance}
\not\Rightarrow
\text{same local chart}.
}
$$

Thus mirror / symmetry / representation equivalence often becomes an atlas mapping:

$$
\boxed{
\mathfrak M:
\text{chart}
\rightarrow
\text{transformed chart}.
}
$$

This connects directly to Numerical Index Geometry in NIOT-05.

---

# 17. Responsibility Fiber

For a conclusion $y$, define:

$$
\boxed{
F_y^R
=
\{
r:
r
\text{ can still be responsible for }y
\}.
}
$$

If:

$$
|F_y^R|
$$

is large, responsibility has not yet been localized.

After adding an admissible probe:

$$
\boxed{
F_{y,t+1}^R
\subseteq
F_{y,t}^R.
}
$$

If:

$$
|F_y^R|=1,
$$

responsibility has been uniquely localized.

Yet this still does not mean that "the conclusion has been proved."

---

# 18. Surviving Responsibility Set

In general, the result need not shrink to a single point.

Thus define:

$$
\boxed{
\mathcal R_y^\star
}
$$

as the surviving responsibility set.

If it forms a connected structural core, call it:

$$
\boxed{
S_{\mathrm{survive}}.
}
$$

A surviving spine need not be a path; it may also be:

- a graph;
- a tree;
- a hypergraph;
- a spectral ridge;
- a local manifold-like object.

---

# 19. Spine Minimality

Ideally, seek:

$$
\boxed{
S^\star
=
\arg\min_S
\operatorname{Size}(S)
}
$$

subject to:

$$
\operatorname{Cover}_{\mathcal T}(S)=1.
$$

covering all task-critical obligations with a minimal responsibility spine.

---

# 20. Responsibility Closure

If all task-critical responsibility nodes have been:

- certified;
- excluded;
- falsified;
- delegated with a finite obligation;
- marked irrelevant to the task;

then:

$$
\boxed{
\operatorname{Close}^{R}_{\mathcal T}=1.
}
$$

this does not require universally answering every question.

Closure is task-relative.

---

# 21. Closure Certificate

Define:

$$
\boxed{
\mathcal C_R
=
\langle
\mathcal T,
S_{\mathrm{survive}},
F_R,
\mathcal O,
\mathcal P,
\mathcal V,
status
\rangle.
}
$$

including at least:

- the task;
- the surviving spine;
- the unresolved frontier;
- overlap evidence;
- probes;
- verification status.

---

# 22. Three-Layer Evidence Separation

NIOT-07 retains the three-layer BCODR-LUC handoff:

```text
STATIC_FORMAL_FACTS
LOCAL_COMPUTE_RESULTS
SECONDARY_VERIFICATION
```

The first layer contains only:

- definitions;
- proved theorems;
- exact symbolic consequences.

The second contains:

- optimizer outputs;
- numerical reconstructions;
- interval results;
- candidate distances.

The third contains:

- independent replay;
- cross-tool verification;
- formal verification;
- held-out validation.

Therefore:

$$
\boxed{
\text{computed}
\neq
\text{proved}
\neq
\text{independently verified}.
}
$$

---

# 23. Missing Is Not Pass

If local computation is missing, the state must be:

```text
PENDING
```

Never default to:

```text
PASS
```

Likewise:

- a missing candidate vector cannot be guessed from an objective value;
- proximity alone does not establish structural alignment;
- local stiffness alone does not establish a global optimum;
- a shared projection alone does not establish canonical identity.

---

# 24. Responsibility Provenance

Every surviving node must answer:

$$
\boxed{
\text{why does this node survive?}
}
$$

One can preserve:

$$
\boxed{
\text{candidate}
\leftarrow
\text{probe}
\leftarrow
\text{source}
}
$$

and:

$$
\boxed{
\text{certificate}
\leftarrow
\text{formal rule}.
}
$$

---

# 25. Responsibility Weight

Define:

$$
\boxed{
w_R(r)
}
$$

denoting:

- task importance;
- uncertainty;
- evidence strength;
- computational cost.

One can seek a weighted minimal spine:

$$
\boxed{
S^\star
=
\arg\min_S
\sum_{r\in S}
w_R(r)
}
$$

subject to responsibility coverage.

---

# 26. Responsibility Coupling

Define:

$$
\boxed{
C_R(r_i,r_j).
}
$$

Strongly coupled responsibility nodes may form a cluster:

$$
\boxed{
\mathcal K_R.
}
$$

Closure may be hierarchical:

$$
\boxed{
\text{cell}
\rightarrow
\text{cluster}
\rightarrow
\text{spine}
\rightarrow
\text{task}.
}
$$

---

# 27. Spectral Responsibility

Following NIOT-04, responsibility itself may vary with the probe parameter:

$$
\boxed{
r(\lambda).
}
$$

forming a responsibility spectrum:

$$
\boxed{
\mathcal S_R(\lambda).
}
$$

If unresolved responsibility is particularly high in a spectral region, this may form a:

$$
\boxed{
\Gamma_R
}
$$

responsibility ridge.

---

# 28. Spectral BCODR

For each $\lambda$:

$$
\mathcal F_\lambda^+,
\qquad
\mathcal F_\lambda^-.
$$

Define:

$$
\boxed{
\mathcal O(\lambda)
=
\mathcal F_\lambda^+
\cap
\mathcal F_\lambda^-.
}
$$

Integrating across the spectrum gives:

$$
\boxed{
S^\Lambda_{\mathrm{survive}}.
}
$$

Thus BCODR can generalize from bidirectional geometric kernels to spectral responsibility localization.

---

# 29. Matrix Responsibility

Within UEFM:

- rows;
- columns;
- blocks;
- sparse modules;

can all become responsibility units.

Define:

$$
\boxed{
F_M
}
$$

as the unresolved matrix frontier.

Forward probes seek candidate-generating blocks; backward probes seek constraint / certificate blocks.

Only the meeting block:

$$
B^\star
$$

is further split / computed.

---

# 30. Bridge Responsibility

The bridge fiber of NIOT-06:

$$
F_y^B
$$

can also form a responsibility space.

Forward:

$$
\boxed{
\text{possible source families}
}
$$

Backward:

$$
\boxed{
\text{target constraints / bridge certificates}.
}
$$

Their meeting yields:

$$
\boxed{
S_B
}
$$

the source-reconstruction responsibility spine.

---

# 31. Float Source Fiber Example

For a float $f$, its rounding fiber:

$$
C_f
$$

may contain several exact source values.

If one additionally supplies:

- a known source interval;
- the rounding mode;
- provenance;
- history;

the backward field can continue shrinking $C_f$.

Therefore:

$$
\boxed{
\text{BCODR in NIOT}
=
\text{bidirectional responsibility localization in a source fiber.}
}
$$

---

# 32. Probe Responsibility

For a conclusion $c$:

$$
\boxed{
\operatorname{Resp}(c)
=
\{
P_{i_1},
\dots,
P_{i_k}
\}.
}
$$

If a conclusion fails, one can trace along its responsibility spine to identify:

- which probe;
- which bridge;
- which certificate;
- which source;

actually bears responsibility.

---

# 33. Explanation Spine

Complete provenance may be vast.

The human explanation layer may output only:

$$
\boxed{
S_{\mathrm{explain}}
}
$$

the minimal necessary responsibility chain.

The machine layer retains the complete responsibility graph.

---

# 34. SEDB Interface

An SEDB-like sparse evidence database is well suited to storing:

- responsibility nodes;
- evidence;
- lifecycle;
- falsification;
- certificates;
- cross-context results.

A candidate lifecycle may be written as:

```text
discovered
active
supported
heldout
cross-context
falsified
revoked
closed
```

Falsification is first-class information and should not simply be deleted.

---

# 35. Negative Evidence

Counterexamples, exclusion certificates, and failures can all shrink a responsibility fiber.

Thus the inward field is often formed primarily from negative evidence:

$$
P^-_{\mathrm{counterexample}},
$$

$$
P^-_{\mathrm{cert}},
$$

$$
P^-_{\mathrm{constraint}}.
$$

---

# 36. Multiple Direction Families

One may have:

$$
P^+_1,\dots,P^+_n,
$$

and:

$$
P^-_1,\dots,P^-_m.
$$

The total fields:

$$
\boxed{
\mathcal F^+
=
\bigcup_i
\mathcal F_i^+,
}
$$

$$
\boxed{
\mathcal F^-
=
\bigcup_j
\mathcal F_j^-.
}
$$

The same cell may be reached jointly by multiple sources and certificates.

---

# 37. Responsibility Multiplicity

Define:

$$
\boxed{
m(\Omega)
=
(m_1^+,\dots,m_n^+,m_1^-,\dots,m_m^-).
}
$$

High multiplicity may indicate critical convergence, but is not itself truth strength: the sources may share the same mistaken premise.

Thus a source-independence probe is needed.

---

# 38. Effective Evidence

Actual evidence strength should consider:

$$
\boxed{
\text{strength}
+
\text{independence}
+
\text{uncertainty}
+
\text{provenance}.
}
$$

rather than merely counting sources.

---

# 39. Active Experiment Selection

If the responsibility frontier remains large, one can select a new experiment / active probe:

$$
\boxed{
E^\star
=
\arg\max_E
\operatorname{ExpectedElimination}(E).
}
$$

The active loop:

$$
\boxed{
G_R
\rightarrow
F_R
\rightarrow
E^\star
\rightarrow
G_R'
\rightarrow
F_R'.
}
$$

Research progress can therefore be defined as:

$$
\boxed{
|F_R|
\downarrow
}
$$

rather than necessarily obtaining the final answer immediately.

---

# 40. Assumption Graph

Each responsibility node should link to assumptions.

Define:

$$
\boxed{
G_A^{\mathrm{assump}}.
}
$$

If an assumption is revoked, all descendants:

$$
\operatorname{Desc}(a)
$$

must be reverified.

---

# 41. Responsibility Rank

Define:

$$
\boxed{
\rho_R
}
$$

as the size of a minimal independent responsibility basis.

If:

$$
\rho_R\ll |V_R|,
$$

many apparent problems are explained by a few root responsibilities.

---

# 42. Root Responsibility Localization

This allows generalized BCODR to perform:

$$
\boxed{
\text{root responsibility localization}.
}
$$

For example:

- proof search;
- debugging;
- AI mechanism analysis;
- data integration;
- numerical reconstruction;
- scientific discovery.

---

# 43. General Responsibility Kernel

The original BCODR circle kernel may be abstracted as:

$$
\boxed{
K_R(r,r').
}
$$

It measures responsibility influence / reachability.

It may be:

- isotropic;
- anisotropic;
- spectral;
- learned;
- Hessian-like;
- semantic.

---

# 44. Kernel Choice Is Model Choice

Different kernels may produce different frontiers.

Thus a kernel-sensitivity probe is needed:

$$
\boxed{
\Delta F_R(K_1,K_2).
}
$$

If multiple kernel families produce a stable frontier, confidence increases.

---

# 45. Responsibility Stability

Define:

$$
\boxed{
S_R(r)
}
$$

to measure a responsibility node's survival stability across:

- probes;
- kernels;
- contexts;
- epochs;

as listed above.

Persistent responsibility may be promoted to the core spine.

---

# 46. Responsibility Geometry

Bidirectional localization forms:

$$
\boxed{
\mathcal G_R.
}
$$

It need not be Euclidean geometry; it may be:

- graph-based;
- hypergraph-based;
- metric;
- spectral;
- topological;
- hybrid.

A local cluster may have a chart:

$$
\boxed{
\phi_R.
}
$$

Role / provenance mappings between charts may produce transition defects and future responsibility-curvature questions.

---

# 47. Distributed Responsibility Closure

Multiple agents may separately handle:

$$
\mathcal K_1,\dots,\mathcal K_m.
$$

Yet local closures cannot be merged directly by majority vote.

One needs evidence-weighted reconciliation based on:

- certificates;
- provenance;
- independence;
- versions;

as listed above.

Global closure exists only after all critical clusters have been reconciled.

---

# 48. Partial Closure

One may output:

$$
\boxed{
\operatorname{Close}^{R}_{\mathcal T}
=
\text{PARTIAL}.
}
$$

This is valuable: a vast search space has been compressed into a finite unresolved frontier.

---

# 49. Budgeted Closure

Define a responsibility budget:

$$
\boxed{
B_R.
}
$$

If the budget is exhausted, one must not falsely declare completion.

Output:

```text
STATUS:
    RESPONSIBILITY_INCOMPLETE

SURVIVING_SPINE:
    ...

UNRESOLVED_FRONTIER:
    ...

NEXT_HIGHEST_VALUE_NODE:
    ...
```

---

# 50. Responsibility Utility

For a frontier node $r$:

$$
\boxed{
U_R(r)
=
\alpha I_R(r)
-
\beta K_R(r)
-
\gamma Q_R(r),
}
$$

where:

- $I_R$: expected closure impact;
- $K_R$: cost;
- $Q_R$: risk / uncertainty.

The next node:

$$
\boxed{
r^\star
=
\arg\max_{r\in F_R}
U_R(r).
}
$$

---

# 51. Synergistic Responsibility Bundles

Strongly coupled responsibilities may need to be addressed together.

Define:

$$
\boxed{
\mathcal B_R.
}
$$

Single-node greedy selection need not be optimal.

This connects to the multi-probe synergy of NIOT-04.

---

# 52. Runtime Data Model

A minimal responsibility runtime:

```json
{
  "task_id": "task:...",
  "directions": {
    "plus": "...",
    "minus": "..."
  },
  "responsibilities": [],
  "overlaps": [],
  "frontier": [],
  "surviving_spine": [],
  "certificates": [],
  "closure": {}
}
```

Responsibility node:

```json
{
  "id": "resp:...",
  "role": "candidate",
  "state": "OPEN",
  "sources": [],
  "provenance": [],
  "dependencies": [],
  "certificate": null
}
```

Overlap cell:

```json
{
  "id": "cell:...",
  "plus_sources": [],
  "minus_sources": [],
  "signature": {},
  "alignment": "STRUCTURAL_OPEN"
}
```

---

# 53. Minimal Example A — Source Reconstruction

Target:

$$
f.
$$

Source domain:

$$
C_f.
$$

Outward: candidate source families.

Inward: rounding mode, provenance, known interval.

Finally:

$$
\boxed{
S_{\mathrm{source}}
\subset
C_f.
}
$$

This is NIOT's source-fiber BCODR.

---

# 54. Minimal Example B — Proof Search

Outward:

candidate lemmas / branches.

Inward:

necessary conditions / counterexamples.

The surviving spine retains branches genuinely approaching both proof completion and the contradiction boundary.

---

# 55. Minimal Example C — Debugging

Outward:

observed failure propagation.

Inward:

known invariants / constraints.

Meeting responsibility cells correspond to possible root causes.

---

# 56. Minimal Example D — AI Representation

Outward:

candidate concept codes / latent mechanisms.

Inward:

behavioral, semantic, held-out constraints.

Structural alignment judges the actual mechanism rather than merely vector proximity.

---

# 57. Formalization Targets

The first stage may formalize:

1. responsibility objects;
2. bidirectional fields;
3. first-overlap sets;
4. container versus true overlap;
5. responsibility graphs;
6. atomic signatures;
7. closure relations;
8. minimality of surviving spines under finite-graph assumptions.

---

# 58. Formal Theorem Candidates

## Theorem A

Container overlap does not imply common-point overlap.

## Theorem B

Missing local data cannot establish point alignment.

## Theorem C

Structural alignment requires declared invariants.

## Theorem D

Responsibility closure can be finite even if the global search space is unbounded.

## Theorem E

Valid falsification weakly reduces the responsibility fiber:

$$
\boxed{
F_{t+1}^R
\subseteq
F_t^R.
}
$$

---

# 59. Open Problems

1. Minimal responsibility kernels;
2. responsibility curvature;
3. optimal bidirectional splitting;
4. $k$-direction responsibility closure;
5. counterfactual / causal responsibility;
6. distributed closure consistency;
7. probabilistic responsibility without collapsing structural semantics.

---

# 60. Multi-Directional Extension

NIOT-04 has shown that bidirectional probing is only a special case of spectral probing.

Thus one may define in the future:

$$
\boxed{
\mathcal O
=
\bigcap_{i=1}^k
\mathcal F_i.
}
$$

Yet higher-order intersection may be too strict; more generally, hypergraph responsibility may be needed rather than pure set intersection.

---

# 61. Interface with NIOT-08

The next paper:

$$
\boxed{
\textbf{NIOT-08 — Canonical Numerical Architecture}
}
$$

will formally integrate:

- ICNS;
- NIOT;
- ISQL;
- AIC;
- CAIR;
- MNVP.

The central interface supplied by NIOT-07 is:

$$
\boxed{
\text{responsibility closure layer}.
}
$$

A canonical numerical architecture must know more than "where the data are"; it must also know:

$$
\boxed{
\text{which positions remain unresolved,
which structures are responsible for which conclusions,
and which certificates support them.}
}
$$

---

# 62. The Central Principles of This Paper

First:

$$
\boxed{
\text{overlap}
\neq
\text{solution}.
}
$$

Second:

$$
\boxed{
\text{container overlap}
\neq
\text{point overlap}.
}
$$

Third:

$$
\boxed{
\text{point proximity}
\neq
\text{structural alignment}.
}
$$

Fourth:

$$
\boxed{
\text{local germ}
\neq
\text{global optimum}.
}
$$

Fifth:

$$
\boxed{
\text{missing}
\neq
\text{pass}.
}
$$

Sixth:

$$
\boxed{
\text{research progress}
=
\text{responsibility localization}
}
$$

need not mean immediately obtaining a final answer.

Seventh:

$$
\boxed{
\text{closure}
=
\text{all task-critical responsibilities resolved or finitely isolated}.
}
$$

---

# 63. Conclusion

BCODR initially appeared to be a special geometric technique:

$$
\text{outward}
\rightarrow
\text{overlap}
\leftarrow
\text{inward}.
$$

Yet the core exposed by the LUC series was not the circle.

Rather:

$$
\boxed{
\text{bidirectional expansion}
\rightarrow
\text{responsibility overlap}
\rightarrow
\text{atomic decomposition}
\rightarrow
\text{role separation}
\rightarrow
\text{local computation}
\rightarrow
\text{certificate closure}.
}
$$

After its generalization in NIOT-07, BCODR is no longer applicable only to geometric proofs.

It may act on:

- numerical source fibers;
- representation bridges;
- proof search;
- debugging;
- AI latent mechanisms;
- scientific hypothesis spaces;
- dynamic matrix frontiers;
- probe responsibility.

Thus its actual role within NIOT is:

$$
\boxed{
\textbf{Bidirectional Structural Localization and Responsibility Closure}.
}
$$

The final output need not be a:

$$
x^\star.
$$

A more important output may be:

$$
\boxed{
S_{\mathrm{survive}},
}
$$

That is:

> The finite structural spine that still genuinely bears responsibility for unresolved problems after all the vast possibilities have been compressed.

This fully matches NIOT's central direction:

$$
\boxed{
\text{not computing all information at once,
but identifying the position actually worth computing next.}
}
$$

Thus BCODR is no longer merely a tool within NIOT.

It becomes:

$$
\boxed{
\text{a method of responsibility localization within microscopic numerical worlds.}
}
$$

The next paper:

$$
\boxed{
\textbf{NIOT-08 — Canonical Numerical Architecture}
}
$$

will integrate identity, probes, UEFM, spectra, index geometry, bridges, responsibility closure, and ICNS / ISQL / CAIR / MNVP into a complete canonical numerical architecture.

---

# Canonical Source Declaration

This file is the UTF-8 Markdown canonical source for `NIOT-07-v0.1`.

The only mathematical delimiters are `$...$` and `$$...$$`.

This paper formally generalizes:
- BCODR bidirectional fields;
- responsibility spaces;
- responsibility objects;
- container overlap;
- true overlap;
- point / seed / structural alignment;
- atomic overlap decomposition;
- responsibility signatures;
- responsibility graphs;
- responsibility frontiers;
- germs;
- responsibility fibers;
- surviving spines;
- responsibility closure;
- static / compute / secondary-verification separation;
- spectral responsibility;
- matrix responsibility;
- bridge responsibility;
- active experiment selection;
- distributed responsibility closure.

This paper does not claim that:
- overlap automatically equals an answer;
- a balanced germ automatically equals a minimizer;
- point proximity automatically equals structural identity;
- local stiffness automatically equals global optimality;
- missing local computation may be presumed to have passed;
- responsibility closure equals ontology-total completion.

Subsequent NIOT-08 should use this paper's responsibility graphs, closure certificates, and surviving spines as the verification and governance layer of canonical architecture.

===END===
