Pith Number

pith:I5WF7S6H

pith:2019:I5WF7S6HF2HLM3DUWMJYMPLSWT

not attested not anchored not stored refs pending

Rationality of complete intersections of two quadrics

Brendan Hassett, Yuri Tschinkel

arxiv:1903.08979 v2 · 2019-03-21 · 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{I5WF7S6HF2HLM3DUWMJYMPLSWT}

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	2026-05-17T23:48:09.065126Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

476c5fcbc72e8eb66c74b313863d72b4c26b8b2c0b42d9907955c19c0dee878c

Aliases

arxiv: 1903.08979 · arxiv_version: 1903.08979v2 · doi: 10.48550/arxiv.1903.08979 · pith_short_12: I5WF7S6HF2HL · pith_short_16: I5WF7S6HF2HLM3DU · pith_short_8: I5WF7S6H

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/I5WF7S6HF2HLM3DUWMJYMPLSWT \
  | 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: 476c5fcbc72e8eb66c74b313863d72b4c26b8b2c0b42d9907955c19c0dee878c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9e2e92a7984c945d079872424c097d07d2327b5e0e8ade0de4632e006e4864b4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2019-03-21T13:20:00Z",
    "title_canon_sha256": "6c7d98f4580bbb3b0f2a223cc98283088972fa9bcb74966ac91bb71259981b96"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.08979",
    "kind": "arxiv",
    "version": 2
  }
}