Pith Number

pith:YTOU2JV3

pith:2014:YTOU2JV3CLZWVDMFL3B45IZWPO

not attested not anchored not stored refs pending

Tighter Undecidability Bounds for Matrix Mortality, Zero-in-the-Corner Problems, and More

Francois Nicolas, Julien Cassaigne, Tero Harju, Vesa Halava

arxiv:1404.0644 v3 · 2014-04-02 · cs.DM · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YTOU2JV3CLZWVDMFL3B45IZWPO}

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.

Receipt and verification

First computed	2026-05-18T02:43:26.017245Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c4dd4d26bb12f36a8d855ec3cea3367b830884bbe142abf2df5cd4249a8a7d3a

Aliases

arxiv: 1404.0644 · arxiv_version: 1404.0644v3 · doi: 10.48550/arxiv.1404.0644 · pith_short_12: YTOU2JV3CLZW · pith_short_16: YTOU2JV3CLZWVDMF · pith_short_8: YTOU2JV3

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/YTOU2JV3CLZWVDMFL3B45IZWPO \
  | 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: c4dd4d26bb12f36a8d855ec3cea3367b830884bbe142abf2df5cd4249a8a7d3a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "55359101d81d7da61f6c74b7f2ab88c8c8f878a6808a370d35ca2c8dfff2f3de",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2014-04-02T18:10:40Z",
    "title_canon_sha256": "c632cf92ee78950a4cbe5b263174fc9b8b7bf60171f854cef66bb0a6091df4d1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1404.0644",
    "kind": "arxiv",
    "version": 3
  }
}