Pith Number

pith:7LMJKU6J

pith:2011:7LMJKU6JEEKGVXWFEGF2CFSDNM

not attested not anchored not stored refs pending

Identifying codes in line graphs

Aline Parreau (IF), Florent Foucaud (LaBRI), Petru Valicov (LaBRI), Reza Naserasr (LaBRI), Sylvain Gravier (IF)

arxiv:1107.0207 v2 · 2011-07-01 · math.CO · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7LMJKU6JEEKGVXWFEGF2CFSDNM}

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	2026-05-18T02:56:11.899641Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fad89553c921146adec5218ba116436b32885f6768e4ed88f4c81065ee9b38e2

Aliases

arxiv: 1107.0207 · arxiv_version: 1107.0207v2 · doi: 10.48550/arxiv.1107.0207 · pith_short_12: 7LMJKU6JEEKG · pith_short_16: 7LMJKU6JEEKGVXWF · pith_short_8: 7LMJKU6J

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/7LMJKU6JEEKGVXWFEGF2CFSDNM \
  | 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: fad89553c921146adec5218ba116436b32885f6768e4ed88f4c81065ee9b38e2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4994f80cf948ae88befc5e7f4f5aa07d0ca32ddbcdb6bd08bbe09c952bb97547",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2011-07-01T12:18:42Z",
    "title_canon_sha256": "e8d193de546ccf0c43e3f7d77d6514e98c188dcb2eebdd89b11b8e9ed3e73937"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.0207",
    "kind": "arxiv",
    "version": 2
  }
}