Pith Number

pith:UHSTRPZ2

pith:2013:UHSTRPZ2NV3RJ2DIC5CZMAINBJ

not attested not anchored not stored refs pending

Affine cones over smooth cubic surfaces

Ivan Cheltsov, Jihun Park, Joonyeong Won

arxiv:1303.2648 v4 · 2013-03-11 · 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{UHSTRPZ2NV3RJ2DIC5CZMAINBJ}

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	2026-05-18T01:14:18.537646Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a1e538bf3a6d7714e868174596010d0a7d68962f1f2a1cdd9b89628421284dd2

Aliases

arxiv: 1303.2648 · arxiv_version: 1303.2648v4 · doi: 10.48550/arxiv.1303.2648 · pith_short_12: UHSTRPZ2NV3R · pith_short_16: UHSTRPZ2NV3RJ2DI · pith_short_8: UHSTRPZ2

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/UHSTRPZ2NV3RJ2DIC5CZMAINBJ \
  | 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: a1e538bf3a6d7714e868174596010d0a7d68962f1f2a1cdd9b89628421284dd2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1f754b14d7c8dc814d083f656ecade984134417c1b63e86f56eb3a0b2d27cc05",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2013-03-11T19:56:40Z",
    "title_canon_sha256": "dc015eed60754a7a31864c809d4c861fa2a00eb7c6a66e35c51db1cdd7e07769"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.2648",
    "kind": "arxiv",
    "version": 4
  }
}