Pith Number

pith:UE7JKLGA

pith:2013:UE7JKLGANY42ORCKWR4TP3U7RB

not attested not anchored not stored refs pending

Zero-nonzero and real-nonreal sign determination

Daniel Perrucci, Marie-Francoise Roy

arxiv:1305.4131 v1 · 2013-05-17 · math.AG · cs.SC

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UE7JKLGANY42ORCKWR4TP3U7RB}

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	2026-05-18T03:25:26.188216Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a13e952cc06e39a7444ab47937ee9f887ccd0593f2627011b7403064e80df7dc

Aliases

arxiv: 1305.4131 · arxiv_version: 1305.4131v1 · doi: 10.48550/arxiv.1305.4131 · pith_short_12: UE7JKLGANY42 · pith_short_16: UE7JKLGANY42ORCK · pith_short_8: UE7JKLGA

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/UE7JKLGANY42ORCKWR4TP3U7RB \
  | 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: a13e952cc06e39a7444ab47937ee9f887ccd0593f2627011b7403064e80df7dc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bed58fd6421d278c490e3b3564cafb242822858865bedfbf48f468f0a2f5d71f",
    "cross_cats_sorted": [
      "cs.SC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2013-05-17T16:46:18Z",
    "title_canon_sha256": "43175e0f23aae2f5f66bdcbc60c307d0c147065615b2023e44bbb5943d290d10"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.4131",
    "kind": "arxiv",
    "version": 1
  }
}