Pith Number

pith:C4G72EKO

pith:2007:C4G72EKOWNJ4VM5UY5RG2R7MZS

not attested not anchored not stored refs pending

General curves on algebraic surfaces

Edoardo Sernesi

arxiv:math/0702865 v4 · 2007-02-28 · 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{C4G72EKOWNJ4VM5UY5RG2R7MZS}

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	2026-05-18T03:34:00.410537Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

170dfd114eb353cab3b4c7626d47eccc86009329db000d2e265d0bd623daa987

Aliases

arxiv: math/0702865 · arxiv_version: math/0702865v4 · doi: 10.48550/arxiv.math/0702865 · pith_short_12: C4G72EKOWNJ4 · pith_short_16: C4G72EKOWNJ4VM5U · pith_short_8: C4G72EKO

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/C4G72EKOWNJ4VM5UY5RG2R7MZS \
  | 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: 170dfd114eb353cab3b4c7626d47eccc86009329db000d2e265d0bd623daa987

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5ac0f6a66b30b3508feed9fbfb1ff91836497fc91115aa54aae9d589f1acd7ae",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2007-02-28T07:38:33Z",
    "title_canon_sha256": "694c4ab0ceb2ad7d354701e0577d202cbb44ab7a8a9ffae9ace5171653a58300"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0702865",
    "kind": "arxiv",
    "version": 4
  }
}