Pith Number

pith:2BCRE53T

pith:2009:2BCRE53T27LWJS7MF3SM3QLZIB

not attested not anchored not stored refs pending

Topology of plane algebraic curves: the algebraic approach

Alex Degtyarev

arxiv:0907.0289 v1 · 2009-07-02 · 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{2BCRE53T27LWJS7MF3SM3QLZIB}

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	2026-05-18T01:05:46.817756Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d045127773d7d764cbec2ee4cdc17940613c25bc47c3ffc405fe0c97042ac48c

Aliases

arxiv: 0907.0289 · arxiv_version: 0907.0289v1 · doi: 10.48550/arxiv.0907.0289 · pith_short_12: 2BCRE53T27LW · pith_short_16: 2BCRE53T27LWJS7M · pith_short_8: 2BCRE53T

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/2BCRE53T27LWJS7MF3SM3QLZIB \
  | 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: d045127773d7d764cbec2ee4cdc17940613c25bc47c3ffc405fe0c97042ac48c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4038da258c459f48bc628b190581073ff8040473cd065971557921aef6bae707",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2009-07-02T05:21:44Z",
    "title_canon_sha256": "6af260b46a1f0459ebe1a2e9f0aa7b4a9ea354eec35184c7a01e24c177834c72"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.0289",
    "kind": "arxiv",
    "version": 1
  }
}