Pith Number

pith:H5TW2KT2

pith:2013:H5TW2KT2EKWKRJ3I64TUOURWXS

not attested not anchored not stored refs pending

Total Thue colourings of graphs

Erika \v{S}krabu\v{l}\'akov\'a, Jens Schreyer

arxiv:1309.3164 v2 · 2013-09-12 · 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{H5TW2KT2EKWKRJ3I64TUOURWXS}

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	2026-05-18T02:25:40.524557Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f676d2a7a22aca8a768f727475236bcbed6b1978e5eaf68e2d51423da63ad9f

Aliases

arxiv: 1309.3164 · arxiv_version: 1309.3164v2 · doi: 10.48550/arxiv.1309.3164 · pith_short_12: H5TW2KT2EKWK · pith_short_16: H5TW2KT2EKWKRJ3I · pith_short_8: H5TW2KT2

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/H5TW2KT2EKWKRJ3I64TUOURWXS \
  | 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: 3f676d2a7a22aca8a768f727475236bcbed6b1978e5eaf68e2d51423da63ad9f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8e3baf9153c9ec50cd25b0abefd5044bd47fa7ee3cccd114ca84b23536c9968c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2013-09-12T14:14:01Z",
    "title_canon_sha256": "b9bfff23b3e46baf787d6fa11324ad43334f8948342406b984a8dbfc37707fe4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.3164",
    "kind": "arxiv",
    "version": 2
  }
}