Pith Number

pith:RPISH2GC

pith:2010:RPISH2GCUGWLVHS6XC3OFP7YZB

not attested not anchored not stored refs pending

The number of maximum matchings in a tree

Clemens Heuberger, Stephan Wagner

arxiv:1011.6554 v1 · 2010-11-30 · 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{RPISH2GCUGWLVHS6XC3OFP7YZB}

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	2026-05-18T03:28:54.364738Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8bd123e8c2a1acba9e5eb8b6e2bff8c8576cbc132bba1b1cdfd6e1dd0f3ea669

Aliases

arxiv: 1011.6554 · arxiv_version: 1011.6554v1 · doi: 10.48550/arxiv.1011.6554 · pith_short_12: RPISH2GCUGWL · pith_short_16: RPISH2GCUGWLVHS6 · pith_short_8: RPISH2GC

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/RPISH2GCUGWLVHS6XC3OFP7YZB \
  | 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: 8bd123e8c2a1acba9e5eb8b6e2bff8c8576cbc132bba1b1cdfd6e1dd0f3ea669

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "19a72225938f8f220a4786608e382c7376a025b15895e1e6dccd3841886b6083",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2010-11-30T14:28:12Z",
    "title_canon_sha256": "6ae74b0cd82f5815be8033ca5739a6875acb08f080eb8dd1b9a010de112f1c6b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1011.6554",
    "kind": "arxiv",
    "version": 1
  }
}