Pith Number

pith:QI4LMPU2

pith:2014:QI4LMPU2ZFSS4KBMXJECR5T53A

not attested not anchored not stored refs pending

Local Fano-Mori contractions of high nef-value

Luca Tasin, Marco Andreatta

arxiv:1405.5353 v2 · 2014-05-21 · 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{QI4LMPU2ZFSS4KBMXJECR5T53A}

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	2026-05-18T02:18:04.298002Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8238b63e9ac9652e282cba4828f67dd80b9be7ba1261f21e31980bc076cb26ab

Aliases

arxiv: 1405.5353 · arxiv_version: 1405.5353v2 · doi: 10.48550/arxiv.1405.5353 · pith_short_12: QI4LMPU2ZFSS · pith_short_16: QI4LMPU2ZFSS4KBM · pith_short_8: QI4LMPU2

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/QI4LMPU2ZFSS4KBMXJECR5T53A \
  | 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: 8238b63e9ac9652e282cba4828f67dd80b9be7ba1261f21e31980bc076cb26ab

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e3ff684b14fa2a99aea81b2ea4c58e4ed51847c1a9dd2865fef7138bec4e3133",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2014-05-21T10:02:14Z",
    "title_canon_sha256": "6be090b084a8034ec40c8c779ffead2351e08d703d22de43f185f5b963d64a27"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1405.5353",
    "kind": "arxiv",
    "version": 2
  }
}