Pith Number

pith:VC6F5HWC

pith:2015:VC6F5HWCELBVVYZGL5OH4GROUB

not attested not anchored not stored refs pending

Equimatchable factor-critical graphs and independence number 2

Eduard Eiben, Michal Kotrbcik

arxiv:1501.07549 v1 · 2015-01-29 · 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{VC6F5HWCELBVVYZGL5OH4GROUB}

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	2026-05-18T02:28:21.674428Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a8bc5e9ec222c35ae3265f5c7e1a2ea076c30bfd7cbd3ee571992b850ab1c715

Aliases

arxiv: 1501.07549 · arxiv_version: 1501.07549v1 · doi: 10.48550/arxiv.1501.07549 · pith_short_12: VC6F5HWCELBV · pith_short_16: VC6F5HWCELBVVYZG · pith_short_8: VC6F5HWC

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/VC6F5HWCELBVVYZGL5OH4GROUB \
  | 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: a8bc5e9ec222c35ae3265f5c7e1a2ea076c30bfd7cbd3ee571992b850ab1c715

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7243de904e3645094f627a242dab20d478ef1c45a771c64ecd48be1b8be314ea",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-01-29T19:14:39Z",
    "title_canon_sha256": "2d45b3ecbded52895cbcca3ddcef62f760bb1d25871e58f4ba57e1060bec495b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.07549",
    "kind": "arxiv",
    "version": 1
  }
}