Pith Number

pith:2UOU7PZ7

pith:2014:2UOU7PZ7X3KZ2VQYAOWPJYFZMO

not attested not anchored not stored refs pending

The skew-rank of oriented graphs

Guihai Yu, Xueliang Li

arxiv:1404.7230 v1 · 2014-04-29 · 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{2UOU7PZ7X3KZ2VQYAOWPJYFZMO}

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	2026-05-18T02:52:57.167883Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d51d4fbf3fbed59d561803acf4e0b9639673b375e955892ed6ee95b83b7a8cc7

Aliases

arxiv: 1404.7230 · arxiv_version: 1404.7230v1 · doi: 10.48550/arxiv.1404.7230 · pith_short_12: 2UOU7PZ7X3KZ · pith_short_16: 2UOU7PZ7X3KZ2VQY · pith_short_8: 2UOU7PZ7

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/2UOU7PZ7X3KZ2VQYAOWPJYFZMO \
  | 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: d51d4fbf3fbed59d561803acf4e0b9639673b375e955892ed6ee95b83b7a8cc7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "941f820a1fe6de4b2a1fcf2be5cd1a033e2a50deadc451e899f3f929ff6e71d0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2014-04-29T04:09:12Z",
    "title_canon_sha256": "7711262100c0d999ddd220b2aa4a07551954b877838a9816ce679bdf6871b9e9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1404.7230",
    "kind": "arxiv",
    "version": 1
  }
}