Pith Number

pith:4R6ZQZ6E

pith:2019:4R6ZQZ6ENNQFAPAR6LYCB6JHU6

not attested not anchored not stored refs pending

Colourings of star systems

David Pike, Iren Darijani

arxiv:1911.06275 v1 · 2019-11-14 · 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{4R6ZQZ6ENNQFAPAR6LYCB6JHU6}

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	2026-07-05T00:19:16.500963Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e47d9867c46b60503c11f2f020f927a792582407a8d49def9668b0edf71e3350

Aliases

arxiv: 1911.06275 · arxiv_version: 1911.06275v1 · doi: 10.48550/arxiv.1911.06275 · pith_short_12: 4R6ZQZ6ENNQF · pith_short_16: 4R6ZQZ6ENNQFAPAR · pith_short_8: 4R6ZQZ6E

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/4R6ZQZ6ENNQFAPAR6LYCB6JHU6 \
  | 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: e47d9867c46b60503c11f2f020f927a792582407a8d49def9668b0edf71e3350

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1168c4939a755f77943a744d8e25713affd893eab715faad7a9e296bbc7df69d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2019-11-14T17:58:40Z",
    "title_canon_sha256": "2ce43d0233f199552f5edca4bd0e78cfac4c128c2bde78b171162e13c0995e08"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1911.06275",
    "kind": "arxiv",
    "version": 1
  }
}