Pith Number

pith:72XOPMN6

pith:2018:72XOPMN6YM376G5NT6MYPK7CGJ

not attested not anchored not stored refs pending

A Tutte polynomial for maps II: the non-orientable case

Andrew Goodall, Bart Litjens, Guus Regts, Llu\'is Vena

arxiv:1804.01496 v1 · 2018-04-04 · 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{72XOPMN6YM376G5NT6MYPK7CGJ}

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	2026-05-18T00:19:14.846146Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

feaee7b1bec337ff1bad9f9987abe2327cecdfbb2079a9d68c352b4eec8521e4

Aliases

arxiv: 1804.01496 · arxiv_version: 1804.01496v1 · doi: 10.48550/arxiv.1804.01496 · pith_short_12: 72XOPMN6YM37 · pith_short_16: 72XOPMN6YM376G5N · pith_short_8: 72XOPMN6

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/72XOPMN6YM376G5NT6MYPK7CGJ \
  | 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: feaee7b1bec337ff1bad9f9987abe2327cecdfbb2079a9d68c352b4eec8521e4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8038323001beb7740b419ea57aaacfbbb5fb64107bd57124cd971fe8c5629e62",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-04-04T16:30:49Z",
    "title_canon_sha256": "3a01970abba39c644a176037cd4be12e36b9a157914b3de5d19460a2868d6b04"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.01496",
    "kind": "arxiv",
    "version": 1
  }
}