Pith Number

pith:P2VDGH4Q

pith:2013:P2VDGH4QMY4HLWLEX4TM5JOXSO

not attested not anchored not stored refs pending

A proof for Padberg's conjecture on rank of matching polytope

Ashwin Arulselvan, Daniel Karch

arxiv:1309.1347 v1 · 2013-09-05 · math.CO · cs.DS

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{P2VDGH4QMY4HLWLEX4TM5JOXSO}

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	2026-05-18T03:14:07.502000Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7eaa331f90663875d964bf26cea5d793859476346dcec8ae0d01cb2351108f99

Aliases

arxiv: 1309.1347 · arxiv_version: 1309.1347v1 · doi: 10.48550/arxiv.1309.1347 · pith_short_12: P2VDGH4QMY4H · pith_short_16: P2VDGH4QMY4HLWLE · pith_short_8: P2VDGH4Q

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/P2VDGH4QMY4HLWLEX4TM5JOXSO \
  | 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: 7eaa331f90663875d964bf26cea5d793859476346dcec8ae0d01cb2351108f99

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "82d63b123ca2b1f7907bf4acaecc843dfa739ab0c52f56446bd527612796bd2f",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2013-09-05T13:49:31Z",
    "title_canon_sha256": "e1605f731e5f19a2c0360f1247388fdda1706fd4a547542d366493429a6eeb47"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.1347",
    "kind": "arxiv",
    "version": 1
  }
}