Pith Number

pith:DBDB5XEH

pith:2005:DBDB5XEHP4C3G6M46EJXKR4XYZ

not attested not anchored not stored refs pending

Cokernel bundles and Fibonacci bundles

Maria Chiara Brambilla

arxiv:math/0505290 v2 · 2005-05-13 · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DBDB5XEHP4C3G6M46EJXKR4XYZ}

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	2026-05-18T04:31:30.141814Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

18461edc877f05b3799cf113754797c66817532eb0ccc8397d3746ca8aa41f5d

Aliases

arxiv: math/0505290 · arxiv_version: math/0505290v2 · doi: 10.48550/arxiv.math/0505290 · pith_short_12: DBDB5XEHP4C3 · pith_short_16: DBDB5XEHP4C3G6M4 · pith_short_8: DBDB5XEH

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/DBDB5XEHP4C3G6M46EJXKR4XYZ \
  | 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: 18461edc877f05b3799cf113754797c66817532eb0ccc8397d3746ca8aa41f5d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8a2f6ed0f3e7080ce969063da4839f902cf2ca1863b31040291bad7c66bd29cc",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.AG",
    "submitted_at": "2005-05-13T17:53:59Z",
    "title_canon_sha256": "0eb8ecfb5e724ce0e2c1b72c5c484ff3e6d1926cd0a52cc20c8dab85fd3a0562"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0505290",
    "kind": "arxiv",
    "version": 2
  }
}