Pith Number

pith:UPME7CT4

pith:2011:UPME7CT4E4LZ7M5YKFMM4CM5OF

not attested not anchored not stored refs pending

Moishezon twistor spaces on 4CP^2

Nobuhiro Honda

arxiv:1112.3109 v1 · 2011-12-14 · math.DG · 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{UPME7CT4E4LZ7M5YKFMM4CM5OF}

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	2026-05-18T04:06:20.165579Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3d84f8a7c27179fb3b85158ce099d71725b5cb239641da3837de3d65bf5f168

Aliases

arxiv: 1112.3109 · arxiv_version: 1112.3109v1 · doi: 10.48550/arxiv.1112.3109 · pith_short_12: UPME7CT4E4LZ · pith_short_16: UPME7CT4E4LZ7M5Y · pith_short_8: UPME7CT4

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/UPME7CT4E4LZ7M5YKFMM4CM5OF \
  | 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: a3d84f8a7c27179fb3b85158ce099d71725b5cb239641da3837de3d65bf5f168

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a52828fe62bdddeb0a120c8724fbb04b53efaaa0edd51673ecb52692e8557052",
    "cross_cats_sorted": [
      "math.AG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2011-12-14T03:35:48Z",
    "title_canon_sha256": "8b1b4fac96e64a946fb29029e10e2262073fcc944e71eaec281d1a18538e4276"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1112.3109",
    "kind": "arxiv",
    "version": 1
  }
}