Pith Number

pith:S6OA6KP3

pith:2013:S6OA6KP3C3FH4ENT6VKV6SYJ6Q

not attested not anchored not stored refs pending

On factoriality of threefolds with isolated singularities

Antonio Rapagnetta, Francesco Polizzi, Pietro Sabatino

arxiv:1305.4371 v3 · 2013-05-19 · 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{S6OA6KP3C3FH4ENT6VKV6SYJ6Q}

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	2026-05-18T02:31:27.557600Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

979c0f29fb16ca7e11b3f5555f4b09f419df7d7c0bdacb3141229b899dec8595

Aliases

arxiv: 1305.4371 · arxiv_version: 1305.4371v3 · doi: 10.48550/arxiv.1305.4371 · pith_short_12: S6OA6KP3C3FH · pith_short_16: S6OA6KP3C3FH4ENT · pith_short_8: S6OA6KP3

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/S6OA6KP3C3FH4ENT6VKV6SYJ6Q \
  | 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: 979c0f29fb16ca7e11b3f5555f4b09f419df7d7c0bdacb3141229b899dec8595

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3394bb0fe3618304152ba9fe72bd1815a3052249fc696c2d6a9f7fca14b05314",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2013-05-19T15:21:19Z",
    "title_canon_sha256": "d6bc545491470b68a5734ad0e93e2c3762b7d06a5337c5dcb1b51dca49492ddd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.4371",
    "kind": "arxiv",
    "version": 3
  }
}