Pith Number

pith:ND6ITLFV

pith:2002:ND6ITLFVWSJBPJKGC2E44TUYOD

not attested not anchored not stored refs pending

Threefolds of P^5 with one apparent quadruple point

Pietro De Poi

arxiv:math/0207104 v1 · 2002-07-12 · 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{ND6ITLFVWSJBPJKGC2E44TUYOD}

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	2026-05-18T00:51:30.835717Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

68fc89acb5b49217a5461689ce4e9870f193a8727b56f2f83c39e5559ecb72f3

Aliases

arxiv: math/0207104 · arxiv_version: math/0207104v1 · doi: 10.48550/arxiv.math/0207104 · pith_short_12: ND6ITLFVWSJB · pith_short_16: ND6ITLFVWSJBPJKG · pith_short_8: ND6ITLFV

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/ND6ITLFVWSJBPJKGC2E44TUYOD \
  | 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: 68fc89acb5b49217a5461689ce4e9870f193a8727b56f2f83c39e5559ecb72f3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "66e4b442a6cf6f16909974dd7d9456dc3374d97f43381383f49377b05d47cc5c",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.AG",
    "submitted_at": "2002-07-12T10:26:58Z",
    "title_canon_sha256": "10d1902693e1c87a2f81cfdec9125b51da13480020b7835f48e71395e43dcccf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0207104",
    "kind": "arxiv",
    "version": 1
  }
}