Pith Number

pith:UKW4JY6Z

pith:1999:UKW4JY6ZKOANMHSNAOEGVFYUV4

not attested not anchored not stored refs pending

An algebraic geometric realization of the Chern character

Paulo Lima-Filho, Ralph L. Cohen

arxiv:math/9912152 v2 · 1999-12-18 · math.AT · 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{UKW4JY6ZKOANMHSNAOEGVFYUV4}

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	2026-05-17T23:42:03.667468Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a2adc4e3d95380d61e4d03886a9714af30770f6824c8bd970c188404175a2b22

Aliases

arxiv: math/9912152 · arxiv_version: math/9912152v2 · doi: 10.48550/arxiv.math/9912152 · pith_short_12: UKW4JY6ZKOAN · pith_short_16: UKW4JY6ZKOANMHSN · pith_short_8: UKW4JY6Z

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/UKW4JY6ZKOANMHSNAOEGVFYUV4 \
  | 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: a2adc4e3d95380d61e4d03886a9714af30770f6824c8bd970c188404175a2b22

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1afa3119f731275136e48dbaeac5d507b442d4c0cb3fde6f63b84bfc1f241eb2",
    "cross_cats_sorted": [
      "math.AG"
    ],
    "license": "",
    "primary_cat": "math.AT",
    "submitted_at": "1999-12-18T23:21:45Z",
    "title_canon_sha256": "d63e672f45b608bd45441f73b38c8b25ebdf332207daf9e94c90d9a9a4216757"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/9912152",
    "kind": "arxiv",
    "version": 2
  }
}