Pith Number

pith:A2OM26SK

pith:2015:A2OM26SKC6P6G3N4SANJ4KZKMN

not attested not anchored not stored refs pending

Cryptomorphisms for abstract rigidity matroids

Emanuele Delucchi, Tim Lindemann

arxiv:1503.03795 v1 · 2015-03-12 · 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{A2OM26SKC6P6G3N4SANJ4KZKMN}

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	2026-05-18T02:24:27.303435Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

069ccd7a4a179fe36dbc901a9e2b2a636070200fe9bebf12232164902c15e10d

Aliases

arxiv: 1503.03795 · arxiv_version: 1503.03795v1 · doi: 10.48550/arxiv.1503.03795 · pith_short_12: A2OM26SKC6P6 · pith_short_16: A2OM26SKC6P6G3N4 · pith_short_8: A2OM26SK

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/A2OM26SKC6P6G3N4SANJ4KZKMN \
  | 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: 069ccd7a4a179fe36dbc901a9e2b2a636070200fe9bebf12232164902c15e10d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "05a4c556b3be445d6279cd0ecba8d48d5fe74182891d57038c81f27660c32264",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-03-12T16:18:56Z",
    "title_canon_sha256": "4d54d245db549284f13defbf2d8a7e15abd735040a7874cb0538c581b59e58f9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.03795",
    "kind": "arxiv",
    "version": 1
  }
}