Pith Number

pith:QOTICG4N

pith:2013:QOTICG4NUUX2PBVLEFDF3MI2UB

not attested not anchored not stored refs pending

Directed Cycle Double Cover Conjecture: Fork Graphs

Andrea Jim\'enez, Martin Loebl

arxiv:1310.5539 v1 · 2013-10-21 · 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{QOTICG4NUUX2PBVLEFDF3MI2UB}

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	2026-05-18T03:09:35.093531Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

83a6811b8da52fa786ab21465db11aa06a83edea13ed6cd390c42d3eb4c85315

Aliases

arxiv: 1310.5539 · arxiv_version: 1310.5539v1 · doi: 10.48550/arxiv.1310.5539 · pith_short_12: QOTICG4NUUX2 · pith_short_16: QOTICG4NUUX2PBVL · pith_short_8: QOTICG4N

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/QOTICG4NUUX2PBVLEFDF3MI2UB \
  | 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: 83a6811b8da52fa786ab21465db11aa06a83edea13ed6cd390c42d3eb4c85315

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c80add93d2bf2ca957583b8f3d167b0c316042dedbe7743aea57ae0b5546398c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2013-10-21T13:37:31Z",
    "title_canon_sha256": "58dc4e5b1b9a927ed690d3f1480d59bfac205fefc5187ca54b45eaa1e3f818b7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1310.5539",
    "kind": "arxiv",
    "version": 1
  }
}