Pith Number

pith:JSRVZZDI

pith:2015:JSRVZZDIL5AGJMNSHFFIEWDHBF

not attested not anchored not stored refs pending

Deformations of weak $\mathbb{Q}$-Fano 3-folds

Taro Sano

arxiv:1512.09209 v2 · 2015-12-31 · 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{JSRVZZDIL5AGJMNSHFFIEWDHBF}

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	2026-05-18T00:35:44.394321Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4ca35ce4685f4064b1b2394a825867095d40e784f25c50ab3abd70ab9250c38a

Aliases

arxiv: 1512.09209 · arxiv_version: 1512.09209v2 · doi: 10.48550/arxiv.1512.09209 · pith_short_12: JSRVZZDIL5AG · pith_short_16: JSRVZZDIL5AGJMNS · pith_short_8: JSRVZZDI

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/JSRVZZDIL5AGJMNSHFFIEWDHBF \
  | 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: 4ca35ce4685f4064b1b2394a825867095d40e784f25c50ab3abd70ab9250c38a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4162a07c6d6c4f2dfa279bd645deee6c2d962232c8870503210f04a42a1a26da",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2015-12-31T03:55:14Z",
    "title_canon_sha256": "62a46106850819db8059f17421f0bde8fbdfc708e7f1ecf63ba19d374e4dcb73"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.09209",
    "kind": "arxiv",
    "version": 2
  }
}