Pith Number

pith:UOYPQ2UA

pith:2007:UOYPQ2UAB4D3GC5HP3QKDQS7YO

not attested not anchored not stored refs pending

Fibered F-Algebra

Aleks Kleyn

arxiv:math/0702561 v3 · 2007-02-19 · math.DG · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UOYPQ2UAB4D3GC5HP3QKDQS7YO}

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	2026-05-18T04:08:52.879401Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3b0f86a800f07b30ba77ee0a1c25fc39eacba727790cbdd5b9e23e1724c092a

Aliases

arxiv: math/0702561 · arxiv_version: math/0702561v3 · doi: 10.48550/arxiv.math/0702561 · pith_short_12: UOYPQ2UAB4D3 · pith_short_16: UOYPQ2UAB4D3GC5H · pith_short_8: UOYPQ2UA

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/UOYPQ2UAB4D3GC5HP3QKDQS7YO \
  | 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: a3b0f86a800f07b30ba77ee0a1c25fc39eacba727790cbdd5b9e23e1724c092a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ce12342b73cd636ad53b3c7e3341f89ec26f0e478bd8f0cf9963d30795752758",
    "cross_cats_sorted": [
      "math.AT"
    ],
    "license": "",
    "primary_cat": "math.DG",
    "submitted_at": "2007-02-19T19:47:01Z",
    "title_canon_sha256": "1c330a65f9c7ae195f3304439727a5f0eb526d189d9b694a58c36df4fd408c53"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0702561",
    "kind": "arxiv",
    "version": 3
  }
}