Pith Number

pith:O2HATR22

pith:2013:O2HATR22SICPUA4GI7ZKCGF4NO

not attested not anchored not stored refs pending

Amalgam width of matroids

Lukas Mach, Tomas Toufar

arxiv:1304.0299 v2 · 2013-04-01 · cs.DM · 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{O2HATR22SICPUA4GI7ZKCGF4NO}

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	2026-05-18T03:21:23.479614Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

768e09c75a9204fa038647f2a118bc6bb2667161fc29e4ac5e0c0d8c6d9768c5

Aliases

arxiv: 1304.0299 · arxiv_version: 1304.0299v2 · doi: 10.48550/arxiv.1304.0299 · pith_short_12: O2HATR22SICP · pith_short_16: O2HATR22SICPUA4G · pith_short_8: O2HATR22

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/O2HATR22SICPUA4GI7ZKCGF4NO \
  | 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: 768e09c75a9204fa038647f2a118bc6bb2667161fc29e4ac5e0c0d8c6d9768c5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "44c6bd35f6b90d538ae35538a1064ea54524ddfd47f42616c2d5f3bb46ebc848",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2013-04-01T06:10:05Z",
    "title_canon_sha256": "e3414a7de988805492b312a3bc0ad97915c2bdd8abc2f8ffaa87e0f29d1263d3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.0299",
    "kind": "arxiv",
    "version": 2
  }
}