Pith Number

pith:KRNF3CFK

pith:2019:KRNF3CFKGJUYMHLWQ5RG5PPQPC

not attested not anchored not stored refs pending

Identifying codes in line digraphs

B. Mart\'inez-Barona, C. Balbuena, C. Dalf\'o

arxiv:1905.05083 v2 · 2019-05-13 · 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{KRNF3CFKGJUYMHLWQ5RG5PPQPC}

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	2026-05-17T23:45:56.359455Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

545a5d88aa3269861d7687626ebdf078b21a495eb0d2c7fd9622e773f70a7cc1

Aliases

arxiv: 1905.05083 · arxiv_version: 1905.05083v2 · doi: 10.48550/arxiv.1905.05083 · pith_short_12: KRNF3CFKGJUY · pith_short_16: KRNF3CFKGJUYMHLW · pith_short_8: KRNF3CFK

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/KRNF3CFKGJUYMHLWQ5RG5PPQPC \
  | 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: 545a5d88aa3269861d7687626ebdf078b21a495eb0d2c7fd9622e773f70a7cc1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "edc0f6f0d268871873b7a023308cac2a183509c94a630f1c162fff60842f731a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2019-05-13T15:25:26Z",
    "title_canon_sha256": "de6f9b00f22831f5c5d72f4f45a606919260aff179aba24c3531ecb33d483f2f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.05083",
    "kind": "arxiv",
    "version": 2
  }
}