Pith Number

pith:E4AXNSLG

pith:2018:E4AXNSLG3LZD7IAYQHYVIUVCFQ

not attested not anchored not stored refs pending

Weight zero part of the first cohomology of complex algebraic varieties

Morihiko Saito

arxiv:1804.03632 v4 · 2018-04-10 · 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{E4AXNSLG3LZD7IAYQHYVIUVCFQ}

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	2026-05-18T00:16:15.903018Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

270176c966daf23fa01881f15452a22c3b78c8c2da3b053f137adf4a108d421e

Aliases

arxiv: 1804.03632 · arxiv_version: 1804.03632v4 · doi: 10.48550/arxiv.1804.03632 · pith_short_12: E4AXNSLG3LZD · pith_short_16: E4AXNSLG3LZD7IAY · pith_short_8: E4AXNSLG

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/E4AXNSLG3LZD7IAYQHYVIUVCFQ \
  | 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: 270176c966daf23fa01881f15452a22c3b78c8c2da3b053f137adf4a108d421e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a5c4a6a5cfd59ea9e83d9a73d8bfef837bdcfe360a7a396bc76d4cceeb9b581f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2018-04-10T17:07:37Z",
    "title_canon_sha256": "9cb86d25eaf7a69d8843d6af481a42d504f539588abc4c8c3c9242c2187030e5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.03632",
    "kind": "arxiv",
    "version": 4
  }
}