Pith Number

pith:DOCTDPJI

pith:2019:DOCTDPJI6TBZUQGV2GRVAFFJZE

not attested not anchored not stored refs pending

Fano varieties of K3 type and IHS manifolds

Enrico Fatighenti, Giovanni Mongardi

arxiv:1904.05679 v1 · 2019-04-11 · 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{DOCTDPJI6TBZUQGV2GRVAFFJZE}

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	2026-05-17T23:48:48.759154Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1b8531bd28f4c39a40d5d1a35014a9c902fadd5e8359f9b4ca98b1e9a2dfd912

Aliases

arxiv: 1904.05679 · arxiv_version: 1904.05679v1 · doi: 10.48550/arxiv.1904.05679 · pith_short_12: DOCTDPJI6TBZ · pith_short_16: DOCTDPJI6TBZUQGV · pith_short_8: DOCTDPJI

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/DOCTDPJI6TBZUQGV2GRVAFFJZE \
  | 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: 1b8531bd28f4c39a40d5d1a35014a9c902fadd5e8359f9b4ca98b1e9a2dfd912

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1cc7b961518925f528391e5022e0bf3ff5e6171388bbe0b5e5e80dcdaea34a3c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2019-04-11T13:20:53Z",
    "title_canon_sha256": "141ddbcbbf580a5200b1a2d94b7771f7c2187122cde5bbd5b286173ba86a4521"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.05679",
    "kind": "arxiv",
    "version": 1
  }
}