Pith Number

pith:7HMXPQLW

pith:2009:7HMXPQLWWVYJOVFJOPAH3OJQ5M

not attested not anchored not stored refs pending

On disjoint matchings in cubic graphs: maximum 2- and 3-edge-colorable subgraphs

Davit Aslanyan, Gagik N. Vardanyan, Samvel S. Petrosyan, Vahan V. Mkrtchyan

arxiv:0909.2767 v3 · 2009-09-15 · 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{7HMXPQLWWVYJOVFJOPAH3OJQ5M}

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	2026-05-18T02:52:56.461375Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f9d977c176b5709754a973c07db930eb1a6fc4123a882b76f9c2726af3f8ad41

Aliases

arxiv: 0909.2767 · arxiv_version: 0909.2767v3 · doi: 10.48550/arxiv.0909.2767 · pith_short_12: 7HMXPQLWWVYJ · pith_short_16: 7HMXPQLWWVYJOVFJ · pith_short_8: 7HMXPQLW

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/7HMXPQLWWVYJOVFJOPAH3OJQ5M \
  | 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: f9d977c176b5709754a973c07db930eb1a6fc4123a882b76f9c2726af3f8ad41

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6b98a077d5420f44d320c67e983bdff45de56e06a028a9d221bfc07492f77fdd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2009-09-15T11:00:49Z",
    "title_canon_sha256": "f5b224e752210a0de0abca4bc4ec60ae0bd4a1da1a189ff7f5e790ba367a5c86"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.2767",
    "kind": "arxiv",
    "version": 3
  }
}