Pith Number

pith:KPPOSNBO

pith:2011:KPPOSNBOI3KB3LRK3JMNIOWOQE

not attested not anchored not stored refs pending

Rainbow Matchings: existence and counting

Guillem Perarnau, Oriol Serra

arxiv:1104.2702 v1 · 2011-04-14 · math.CO · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KPPOSNBOI3KB3LRK3JMNIOWOQE}

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	2026-05-18T04:24:27.015568Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

53dee9342e46d41dae2ada58d43ace811eaf1f020d57e5f11b3addad577fb2bf

Aliases

arxiv: 1104.2702 · arxiv_version: 1104.2702v1 · doi: 10.48550/arxiv.1104.2702 · pith_short_12: KPPOSNBOI3KB · pith_short_16: KPPOSNBOI3KB3LRK · pith_short_8: KPPOSNBO

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/KPPOSNBOI3KB3LRK3JMNIOWOQE \
  | 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: 53dee9342e46d41dae2ada58d43ace811eaf1f020d57e5f11b3addad577fb2bf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "767ea8148282012f2f086b89c50a747e96965bf86406c01aaedddebbbf75a1a7",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2011-04-14T09:08:04Z",
    "title_canon_sha256": "6f8a4f36630df6cd2576335a63b6fd09c2cb588c250e139cf9ec58f455d555f0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.2702",
    "kind": "arxiv",
    "version": 1
  }
}