Pith Number

pith:P2MZ4YHD

pith:2008:P2MZ4YHDKE4NSWMEBHL344P2N4

not attested not anchored not stored refs pending

Motivic characteristic classes

Shoji Yokura

arxiv:0812.4584 v2 · 2008-12-25 · math.AG · 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{P2MZ4YHDKE4NSWMEBHL344P2N4}

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	2026-05-18T04:11:40.881136Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7e999e60e35138d9598409d7be71fa6f3314227ad82ebee4c8ccc2b731a41664

Aliases

arxiv: 0812.4584 · arxiv_version: 0812.4584v2 · doi: 10.48550/arxiv.0812.4584 · pith_short_12: P2MZ4YHDKE4N · pith_short_16: P2MZ4YHDKE4NSWME · pith_short_8: P2MZ4YHD

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/P2MZ4YHDKE4NSWMEBHL344P2N4 \
  | 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: 7e999e60e35138d9598409d7be71fa6f3314227ad82ebee4c8ccc2b731a41664

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3776960563f083cc901567e3d789618fee9173e602a86f9a808dfb7e44c32757",
    "cross_cats_sorted": [
      "math.AT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2008-12-25T04:01:37Z",
    "title_canon_sha256": "32c18c5d606262d7f7feb7df8f77b756e0019d8bf5c3f92959c96e19f0998e91"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0812.4584",
    "kind": "arxiv",
    "version": 2
  }
}