Pith Number

pith:S5L67XGM

pith:2013:S5L67XGMQVVAUPY26M6YW7XFNK

not attested not anchored not stored refs pending

Apparent contours of nonsingular real cubic surfaces

Sergey Finashin, Viatcheslav Kharlamov

arxiv:1306.2002 v3 · 2013-06-09 · 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{S5L67XGMQVVAUPY26M6YW7XFNK}

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	2026-05-18T02:27:49.620224Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9757efdccc856a0a3f1af33d8b7ee56aa0973c62054792bf28d5a6c911c29c15

Aliases

arxiv: 1306.2002 · arxiv_version: 1306.2002v3 · doi: 10.48550/arxiv.1306.2002 · pith_short_12: S5L67XGMQVVA · pith_short_16: S5L67XGMQVVAUPY2 · pith_short_8: S5L67XGM

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/S5L67XGMQVVAUPY26M6YW7XFNK \
  | 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: 9757efdccc856a0a3f1af33d8b7ee56aa0973c62054792bf28d5a6c911c29c15

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "22a52789e7a64230cb21e40f98b83932807c716594462d5e390f6f58a39150da",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2013-06-09T10:11:00Z",
    "title_canon_sha256": "0f0a047d151316fff056564ebe85abd988c8fd55d43c4ae820ae9a4922785d6a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.2002",
    "kind": "arxiv",
    "version": 3
  }
}