Pith Number

pith:47AJ5USE

pith:2011:47AJ5USEUYG6DU3LPXQUTEO5AO

not attested not anchored not stored refs pending

Isomorphism for even cycle matroids - I

Bertrand Guenin, Irene Pivotto, Paul Wollan

arxiv:1109.2978 v1 · 2011-09-14 · 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{47AJ5USEUYG6DU3LPXQUTEO5AO}

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	2026-05-18T04:13:06.553742Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e7c09ed244a60de1d36b7de14991dd03a4dd20571ae4687bbff7b021fda564bd

Aliases

arxiv: 1109.2978 · arxiv_version: 1109.2978v1 · doi: 10.48550/arxiv.1109.2978 · pith_short_12: 47AJ5USEUYG6 · pith_short_16: 47AJ5USEUYG6DU3L · pith_short_8: 47AJ5USE

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/47AJ5USEUYG6DU3LPXQUTEO5AO \
  | 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: e7c09ed244a60de1d36b7de14991dd03a4dd20571ae4687bbff7b021fda564bd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ff3a791b3988084cef79e4c0bf8d87524a4933b66104d91278c6bbcd141e894d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2011-09-14T02:41:58Z",
    "title_canon_sha256": "89f42c1694d2550a219a92b9596f2921f9742256ce41e9378863df1bd7dfbbe7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.2978",
    "kind": "arxiv",
    "version": 1
  }
}