Pith Number

pith:7RY6HOPI

pith:2012:7RY6HOPIH2H2JWFBNWK5JGQHIJ

not attested not anchored not stored refs pending

Fully Packed Loops in a triangle: matchings, paths and puzzles

Ilse Fischer, Philippe Nadeau

arxiv:1209.1262 v1 · 2012-09-06 · 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{7RY6HOPIH2H2JWFBNWK5JGQHIJ}

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	2026-05-18T03:46:06.073407Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc71e3b9e83e8fa4d8a16d95d49a07425f2a17141354067128582b9e6766e0e4

Aliases

arxiv: 1209.1262 · arxiv_version: 1209.1262v1 · doi: 10.48550/arxiv.1209.1262 · pith_short_12: 7RY6HOPIH2H2 · pith_short_16: 7RY6HOPIH2H2JWFB · pith_short_8: 7RY6HOPI

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/7RY6HOPIH2H2JWFBNWK5JGQHIJ \
  | 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: fc71e3b9e83e8fa4d8a16d95d49a07425f2a17141354067128582b9e6766e0e4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "583fe35d89d19f4e67fde5daa09fb968622e49714b95a97cd037b449e79f7cc2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2012-09-06T11:50:19Z",
    "title_canon_sha256": "355de87650b5cd32aedcef7454c8880683239b71c5ea1161dfb3cbf18fff535a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.1262",
    "kind": "arxiv",
    "version": 1
  }
}