Pith Number

pith:QCIF3AB7

pith:2015:QCIF3AB7O224PUZWTFC3ZDEQCB

not attested not anchored not stored refs pending

Perfect Matchings in Hypergraphs and the Erd\H{o}s matching conjecture

Jie Han

arxiv:1512.07177 v2 · 2015-12-22 · 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{QCIF3AB7O224PUZWTFC3ZDEQCB}

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	2026-05-18T01:15:06.426139Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

80905d803f76b5c7d3369945bc8c90107c977d09244b61e46943e259d26f3b22

Aliases

arxiv: 1512.07177 · arxiv_version: 1512.07177v2 · doi: 10.48550/arxiv.1512.07177 · pith_short_12: QCIF3AB7O224 · pith_short_16: QCIF3AB7O224PUZW · pith_short_8: QCIF3AB7

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/QCIF3AB7O224PUZWTFC3ZDEQCB \
  | 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: 80905d803f76b5c7d3369945bc8c90107c977d09244b61e46943e259d26f3b22

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "195f401b5f5abbe863b17248b2cd5ec09923c1b999a14a8cd5f83e73841dc4d3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-12-22T17:51:45Z",
    "title_canon_sha256": "27c689e139d7f6ac3a667765f35c55bf360e54715ce917a87c52ab91d5cdd04e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.07177",
    "kind": "arxiv",
    "version": 2
  }
}