Pith Number

pith:YE3YFY7J

pith:2009:YE3YFY7JRKOLJ4FEG5NTADHTAU

not attested not anchored not stored refs pending

Motivic construction of cohomological invariants

Nikita Semenov

arxiv:0905.4384 v4 · 2009-05-27 · 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{YE3YFY7JRKOLJ4FEG5NTADHTAU}

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	2026-05-18T02:17:52.705146Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c13782e3e98a9cb4f0a4375b300cf3052ae814f39d58d67ea83601e0dc6244c9

Aliases

arxiv: 0905.4384 · arxiv_version: 0905.4384v4 · doi: 10.48550/arxiv.0905.4384 · pith_short_12: YE3YFY7JRKOL · pith_short_16: YE3YFY7JRKOLJ4FE · pith_short_8: YE3YFY7J

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/YE3YFY7JRKOLJ4FEG5NTADHTAU \
  | 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: c13782e3e98a9cb4f0a4375b300cf3052ae814f39d58d67ea83601e0dc6244c9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4de3c46a850edd41370641990d386bf300ed0c13dd1d6bbed3cc1673fb7c0ec6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2009-05-27T11:47:05Z",
    "title_canon_sha256": "b7a936aa5b1a0c95e4cf315b2e330aa31a211ce7a0ec68c245bc68164686a50f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.4384",
    "kind": "arxiv",
    "version": 4
  }
}