Pith Number

pith:N4XRHIOU

pith:2009:N4XRHIOUJ5I454GL5NMX4OIVGK

not attested not anchored not stored refs pending

Castelnuovo-Mumford Regularity and Computing the de Rham Cohomology of Smooth Projective Varieties

Peter Scheiblechner

arxiv:0905.2212 v4 · 2009-05-13 · math.AG · cs.SC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{N4XRHIOUJ5I454GL5NMX4OIVGK}

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	2026-05-18T04:06:43.775191Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6f2f13a1d44f51cef0cbeb597e391532a3f88e3f179c8326fde67b2bd6e7bcf7

Aliases

arxiv: 0905.2212 · arxiv_version: 0905.2212v4 · doi: 10.48550/arxiv.0905.2212 · pith_short_12: N4XRHIOUJ5I4 · pith_short_16: N4XRHIOUJ5I454GL · pith_short_8: N4XRHIOU

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/N4XRHIOUJ5I454GL5NMX4OIVGK \
  | 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: 6f2f13a1d44f51cef0cbeb597e391532a3f88e3f179c8326fde67b2bd6e7bcf7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8312b5406a5fde44672dfe1e0b041975a1de3a7ec5ca8ab5fa670a6d9b6eeab1",
    "cross_cats_sorted": [
      "cs.SC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2009-05-13T22:24:17Z",
    "title_canon_sha256": "8629648e39036eb59c4ca728d04b317798ebe78533733220b8e913a9affa5b88"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.2212",
    "kind": "arxiv",
    "version": 4
  }
}