Pith Number

pith:4HHYVSK6

pith:2006:4HHYVSK6KNHPM4LVXIUMAFSJWC

not attested not anchored not stored refs pending

Infinitely generated Lawson homology groups on some rational projective varieties

Wenchuan Hu

arxiv:math/0602517 v1 · 2006-02-23 · 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{4HHYVSK6KNHPM4LVXIUMAFSJWC}

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	2026-07-04T14:53:25.959306Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e1cf8ac95e534ef67175ba28c01649b092c5e8a76e2d6124b74a5e1d6c2312d0

Aliases

arxiv: math/0602517 · arxiv_version: math/0602517v1 · doi: 10.48550/arxiv.math/0602517 · pith_short_12: 4HHYVSK6KNHP · pith_short_16: 4HHYVSK6KNHPM4LV · pith_short_8: 4HHYVSK6

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/4HHYVSK6KNHPM4LVXIUMAFSJWC \
  | 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: e1cf8ac95e534ef67175ba28c01649b092c5e8a76e2d6124b74a5e1d6c2312d0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6ac91b1fa606b9fd22e72e39ab1c74485387e01a637b5b65ea85bea701bdf71f",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.AG",
    "submitted_at": "2006-02-23T02:25:45Z",
    "title_canon_sha256": "5512a53e60a74f983b3c6b72f9b2f81d55c942a43e83316c1c191cd8bfb6e42b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0602517",
    "kind": "arxiv",
    "version": 1
  }
}