Pith Number

pith:QV2W4WHN

pith:2017:QV2W4WHNIA2GQWTIYHVB3KHRB7

not attested not anchored not stored refs pending

Tree-Residue Vertex-Breaking: a new tool for proving hardness

Erik D. Demaine, Mikhail Rudoy

arxiv:1706.07900 v3 · 2017-06-24 · cs.CC · cs.CG

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QV2W4WHNIA2GQWTIYHVB3KHRB7}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Cited by

1 paper in Pith

ASP-Completeness of Hamiltonicity in Grid Graphs, with Applications to Loop Puzzles

Receipt and verification

First computed	2026-05-18T00:16:56.344390Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85756e58ed4034685a68c1ea1da8f10ff52440d53b3c255dc209d9dab4914731

Aliases

arxiv: 1706.07900 · arxiv_version: 1706.07900v3 · doi: 10.48550/arxiv.1706.07900 · pith_short_12: QV2W4WHNIA2G · pith_short_16: QV2W4WHNIA2GQWTI · pith_short_8: QV2W4WHN

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/QV2W4WHNIA2GQWTIYHVB3KHRB7 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 85756e58ed4034685a68c1ea1da8f10ff52440d53b3c255dc209d9dab4914731

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ecee71509a2ad8350766f5e1747b4388aef7804defadafb9fa3f5aeaecc3d8e1",
    "cross_cats_sorted": [
      "cs.CG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2017-06-24T03:32:42Z",
    "title_canon_sha256": "1184a03a29cb6057f02d1892d522fdcbf4d41cf2b1d28ccc25b4771a5d23c93f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1706.07900",
    "kind": "arxiv",
    "version": 3
  }
}