Pith Number

pith:UOJLNV37

pith:2012:UOJLNV37GNSZ6BBYITTW4FA557

not attested not anchored not stored refs pending

Nonrepetitive choice number of trees

Jakub Kozik, Piotr Micek

arxiv:1207.5155 v1 · 2012-07-21 · 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{UOJLNV37GNSZ6BBYITTW4FA557}

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	2026-05-18T03:50:24.387569Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a392b6d77f33659f043844e76e141deff9a6e3f6d3af9948f241d76318b05fca

Aliases

arxiv: 1207.5155 · arxiv_version: 1207.5155v1 · doi: 10.48550/arxiv.1207.5155 · pith_short_12: UOJLNV37GNSZ · pith_short_16: UOJLNV37GNSZ6BBY · pith_short_8: UOJLNV37

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/UOJLNV37GNSZ6BBYITTW4FA557 \
  | 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: a392b6d77f33659f043844e76e141deff9a6e3f6d3af9948f241d76318b05fca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "67996ab67fc3dbbf1c2d17df1e014a67b02c8eca833c67c800d6b77fffd16149",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2012-07-21T15:19:16Z",
    "title_canon_sha256": "d9799613d3a6b855cc2d4945f9828e8203c694b8834876e6e174a507f0aa600a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.5155",
    "kind": "arxiv",
    "version": 1
  }
}