Pith Number

pith:Y2JVQ3HR

pith:2015:Y2JVQ3HRF64XFDYXFHANZWARPA

not attested not anchored not stored refs pending

The Thue choice number versus the Thue chromatic number of graphs

Erika \v{S}krabu\v{l}\'akov\'a

arxiv:1508.02559 v1 · 2015-08-11 · 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{Y2JVQ3HRF64XFDYXFHANZWARPA}

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	2026-05-18T01:35:28.851421Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c693586cf12fb9728f1729c0dcd811783c56c8e7107c6b7290e24f78456f5985

Aliases

arxiv: 1508.02559 · arxiv_version: 1508.02559v1 · doi: 10.48550/arxiv.1508.02559 · pith_short_12: Y2JVQ3HRF64X · pith_short_16: Y2JVQ3HRF64XFDYX · pith_short_8: Y2JVQ3HR

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/Y2JVQ3HRF64XFDYXFHANZWARPA \
  | 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: c693586cf12fb9728f1729c0dcd811783c56c8e7107c6b7290e24f78456f5985

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ca9e01267911e71051cd210ae8e6fcefa10566b4c864654ae1d7b8fb34eacc10",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-08-11T11:18:32Z",
    "title_canon_sha256": "faacf24e5ebeb2db2b00fd0faaed8ab5da39db03b0baa9b9ac6bd8a2870af6c5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.02559",
    "kind": "arxiv",
    "version": 1
  }
}