Pith Number

pith:CUN4NVXN

pith:2018:CUN4NVXNIUW2QAPQOWDYZCJSDH

not attested not anchored not stored refs pending

Tutorial on Tom and Jerry: the two smoothings of the anticanonical cone over PP(1,2,3)

Gavin Brown, Jan Stevens, Miles Reid

arxiv:1812.02594 v1 · 2018-12-06 · 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{CUN4NVXNIUW2QAPQOWDYZCJSDH}

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	2026-05-17T23:58:55.355844Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

151bc6d6ed452da801f075878c893219e4b7285f04d5fe6b0ec3cfaa9e38b7a3

Aliases

arxiv: 1812.02594 · arxiv_version: 1812.02594v1 · doi: 10.48550/arxiv.1812.02594 · pith_short_12: CUN4NVXNIUW2 · pith_short_16: CUN4NVXNIUW2QAPQ · pith_short_8: CUN4NVXN

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/CUN4NVXNIUW2QAPQOWDYZCJSDH \
  | 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: 151bc6d6ed452da801f075878c893219e4b7285f04d5fe6b0ec3cfaa9e38b7a3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e50302366e9ea32abbd601ffc8d6ef73c8dbd502ac574e28b417ff4fdb67ea28",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2018-12-06T15:10:09Z",
    "title_canon_sha256": "87c48fd4eec6243a527d00381410ac3958a70593e5cc9b13d4c69f3ac6df3a18"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1812.02594",
    "kind": "arxiv",
    "version": 1
  }
}