Pith Number

pith:WHG4VAWW

pith:2008:WHG4VAWWXB7QYFD27XXITR42GT

not attested not anchored not stored refs pending

Quaternionic contact manifolds with a closed fundamental 4-form

Dimiter Vassilev, Stefan Ivanov

arxiv:0810.3888 v2 · 2008-10-21 · math.DG · math.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WHG4VAWWXB7QYFD27XXITR42GT}

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	2026-05-18T02:58:11.005922Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b1cdca82d6b87f0c147afdee89c79a34e63d1248920e530b00f596e94c0ee2c9

Aliases

arxiv: 0810.3888 · arxiv_version: 0810.3888v2 · doi: 10.48550/arxiv.0810.3888 · pith_short_12: WHG4VAWWXB7Q · pith_short_16: WHG4VAWWXB7QYFD2 · pith_short_8: WHG4VAWW

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/WHG4VAWWXB7QYFD27XXITR42GT \
  | 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: b1cdca82d6b87f0c147afdee89c79a34e63d1248920e530b00f596e94c0ee2c9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "da61f4acad83dff791fa175b4ebd273111faa51ec14336298959badbb821e1ce",
    "cross_cats_sorted": [
      "math.AP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2008-10-21T18:07:44Z",
    "title_canon_sha256": "c96b18d241eb03d0d91a7efd832a3186ee75f3737f2dd056da78d28e6f83ddaf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0810.3888",
    "kind": "arxiv",
    "version": 2
  }
}