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Add 10 WOWII open conjectures (batch 2)#3796

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Add 10 WOWII open conjectures (batch 2)#3796
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henrykmichalewski:wowii-batch-2

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Adds 10 open conjectures from WOWII (Written on the Wall II) by E. DeLaViña.
Follow-up to #3795 (batch 1, 16 conjectures).

Reference: http://cms.dt.uh.edu/faculty/delavinae/research/wowII/

Conjectures

  • distEven-based (3): Conj 23, 24, 63 — lower bounds on b(G), f(G) via min distEven
  • tree(G)-based (3): Conj 72, 84, 85 — tree(G) lower bounds
  • Upper bounds (2): Conj 91 on b(G), Conj 96 on α(G)
  • Hamiltonian sufficient (2): Conj 189 (uses σ = 2-dom), Conj 199 (uses κ = connectivity)

New definitions (local to each file, self-contained)

  • distEven G v — count of vertices at even distance from v
  • largestInducedTreeSize — reused from batch 1
  • twoDominationNumber — σ(G), 2-domination number
  • vertexConnectivity — κ(G), for Conj 199

Each file is self-contained (definitions copied as needed) to keep PRs atomic.

Tests

All 10 files include 1-2 fully-proved @[category test] examples.

Build

Passes cleanly.

Assisted by Claude (Anthropic).

Medium-difficulty conjectures using distEven(v), tree(G), and related invariants.

## Conjectures
- 23, 24, 63: involve distEven (min vertices at even distance)
- 72, 84, 85: involve tree(G) (largest induced tree)
- 91, 96: upper bounds on b(G) / α(G)
- 189: Hamiltonian via max distEven + σ(G) (2-domination)
- 199: Hamiltonian via tree(G) and vertex connectivity κ(G)

## New definitions (local, self-contained)
- distEven G v
- largestInducedTreeSize (reused from batch 1)
- twoDominationNumber (new, for σ(G))
- vertexConnectivity (new, for κ(G))

## Tests
Each file has 1-2 fully-proved @[category test] examples.

Reference: E. DeLaVina, Written on the Wall II
http://cms.dt.uh.edu/faculty/delavinae/research/wowII/

Assisted by Claude (Anthropic).
henrykmichalewski added a commit to henrykmichalewski/formal-conjectures that referenced this pull request Apr 18, 2026
This branch accumulates all WOWII batches beyond batch 1 (google-deepmind#3795) and batch 2 (google-deepmind#3796).
Total new files: 48, covering ~50 new invariants.

Batches:
- 3 (5 files): residue, distMin/Max — 18, 59, 61, 65, 109
- 4 (9 files): path/tree hard cases, C₄ — 31, 36, 100, 103, 133, 142, 143, 144, 314
- 5 (5 files): alphaCore, graphSquare, triangles — 101, 145, 146, 160, 291
- 6 (5 files): matching, circumference, oddGirth, etc.
- 7 (8 files): length, toughness, distOdd, edgeConnectivity, mode, power, freqMaxL, residue2
- 8 (8 files): arboricity, degeneracy, metricDimension, geodeticNumber, modeMax, medianDegree, evenModeMin, girthComplement
- 9 (8 files): achromaticNumber, bandwidth, boxicity, crossingNumber, isoperimetric, rainbowConnection, romanDomination, thickness

Many have proved theorems (particularly classical results stated with sorry).
Each file includes sanity-check tests.

This is a staging branch for easier review / cherry-picking into smaller PRs.

Assisted by Claude (Anthropic).
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