Pith Number

pith:NB4RWTRA

pith:2010:NB4RWTRAAUGXVTAELODY2EQEGT

not attested not anchored not stored refs pending

On the heterochromatic number of hypergraphs associated to geometric graphs and to matroids

Eduardo Rivera-Campo, Juan Jos\'e Montellano-Ballesteros

arxiv:1011.4888 v1 · 2010-11-22 · 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{NB4RWTRAAUGXVTAELODY2EQEGT}

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	2026-05-18T01:27:55.155310Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

68791b4e20050d7acc045b878d120434d05a1e4ef892f348eb19b4d699e55128

Aliases

arxiv: 1011.4888 · arxiv_version: 1011.4888v1 · doi: 10.48550/arxiv.1011.4888 · pith_short_12: NB4RWTRAAUGX · pith_short_16: NB4RWTRAAUGXVTAE · pith_short_8: NB4RWTRA

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/NB4RWTRAAUGXVTAELODY2EQEGT \
  | 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: 68791b4e20050d7acc045b878d120434d05a1e4ef892f348eb19b4d699e55128

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "64a74391bf15d8c2283e73b867323d25a45ad4f9fee858d931144996b2d24681",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2010-11-22T17:55:20Z",
    "title_canon_sha256": "8823ac3698903c13519c9b898b6ce5ee3b0cced49af875920aced9785fbeeb62"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1011.4888",
    "kind": "arxiv",
    "version": 1
  }
}