Pith Number

pith:YUBLHO7V

pith:2006:YUBLHO7V5NBQ5ESLYR7JFCBU5O

not attested not anchored not stored refs pending

Color Degree Condition for Large Heterochromatic Matchings in Edge-Colored Bipartite Graphs

Lin Hu, Xueliang Li

arxiv:math/0606749 v5 · 2006-06-29 · 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{YUBLHO7V5NBQ5ESLYR7JFCBU5O}

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	2026-05-18T04:08:53.382204Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c502b3bbf5eb430e924bc47e928834ebb730daae3bf34c3db339a42b84936c0f

Aliases

arxiv: math/0606749 · arxiv_version: math/0606749v5 · doi: 10.48550/arxiv.math/0606749 · pith_short_12: YUBLHO7V5NBQ · pith_short_16: YUBLHO7V5NBQ5ESL · pith_short_8: YUBLHO7V

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/YUBLHO7V5NBQ5ESLYR7JFCBU5O \
  | 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: c502b3bbf5eb430e924bc47e928834ebb730daae3bf34c3db339a42b84936c0f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7796e285b5939ab612e3ba11832f564d2211d83973265bf1c189da46247c2387",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.CO",
    "submitted_at": "2006-06-29T10:05:05Z",
    "title_canon_sha256": "7e25c6549d5e7a972f96211d070490197a13a55ba4d112ae7194c365ae18351e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0606749",
    "kind": "arxiv",
    "version": 5
  }
}