Pith Number

pith:M7LYDEIO

pith:2013:M7LYDEIO62BETDUAQEEKV6JEV4

not attested not anchored not stored refs pending

Polynomial-time perfect matchings in dense hypergraphs

Fiachra Knox, Peter Keevash, Richard Mycroft

arxiv:1307.2608 v2 · 2013-07-09 · 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{M7LYDEIO62BETDUAQEEKV6JEV4}

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	2026-05-18T01:33:16.905378Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

67d781910ef682498e808108aaf924af23b1b0174c1b2b8b8a48dbda287287ea

Aliases

arxiv: 1307.2608 · arxiv_version: 1307.2608v2 · doi: 10.48550/arxiv.1307.2608 · pith_short_12: M7LYDEIO62BE · pith_short_16: M7LYDEIO62BETDUA · pith_short_8: M7LYDEIO

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/M7LYDEIO62BETDUAQEEKV6JEV4 \
  | 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: 67d781910ef682498e808108aaf924af23b1b0174c1b2b8b8a48dbda287287ea

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "074b443bf762fb62a2487016e04be6a0dca37e22865371df487976a9a63c9925",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2013-07-09T22:00:06Z",
    "title_canon_sha256": "b91bf2312bc7f2313ce007802097d3a5ab2edf21bdb87e790e48321cd37ac028"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.2608",
    "kind": "arxiv",
    "version": 2
  }
}