Pith Number

pith:RPHDR22G

pith:2014:RPHDR22GUWMHRPDDOWAY6DT7Q3

not attested not anchored not stored refs pending

Noncommutative quadric surfaces and noncommutative conifolds

Kazushi Ueda, Shinnosuke Okawa

arxiv:1403.0713 v1 · 2014-03-04 · math.AG

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RPHDR22GUWMHRPDDOWAY6DT7Q3}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T02:57:15.899708Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8bce38eb46a59878bc6375818f0e7f86f407a99a9605a16cdbdeb1c9ea1ced7f

Aliases

arxiv: 1403.0713 · arxiv_version: 1403.0713v1 · doi: 10.48550/arxiv.1403.0713 · pith_short_12: RPHDR22GUWMH · pith_short_16: RPHDR22GUWMHRPDD · pith_short_8: RPHDR22G

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/RPHDR22GUWMHRPDDOWAY6DT7Q3 \
  | 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: 8bce38eb46a59878bc6375818f0e7f86f407a99a9605a16cdbdeb1c9ea1ced7f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9f62cb42e0c3cd4fca95def52244bfd1185c57fabe154191d583e444f7c8f0d1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2014-03-04T08:24:04Z",
    "title_canon_sha256": "fdf82bffdbae77f8e21cce03f15f711c68a7a3209b98bd133c1ae7bc20f41612"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1403.0713",
    "kind": "arxiv",
    "version": 1
  }
}