Pith Number

pith:HM2CQPKZ

pith:2006:HM2CQPKZCQGL4HHS72DCBBR6CG

not attested not anchored not stored refs pending

Self-dual metrics in Husain's approach

J. Tafel, M. Jakimowicz

arxiv:gr-qc/0603133 v2 · 2006-03-31 · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HM2CQPKZCQGL4HHS72DCBBR6CG}

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	2026-05-18T01:20:56.392024Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3b34283d59140cbe1cf2fe8620863e11bd4ef3f05edaf55896beb724ec86a10d

Aliases

arxiv: gr-qc/0603133 · arxiv_version: gr-qc/0603133v2 · doi: 10.48550/arxiv.gr-qc/0603133 · pith_short_12: HM2CQPKZCQGL · pith_short_16: HM2CQPKZCQGL4HHS · pith_short_8: HM2CQPKZ

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/HM2CQPKZCQGL4HHS72DCBBR6CG \
  | 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: 3b34283d59140cbe1cf2fe8620863e11bd4ef3f05edaf55896beb724ec86a10d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "17db32f1be38e4d918e8e90ea24f1c8b2c02f0b3cdebc4511b66c36640d9b2e7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2006-03-31T15:36:59Z",
    "title_canon_sha256": "d7d1127ab7a387e36a1f9961ca396ee7abd6f8b076ea999ec7a602286e271013"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/0603133",
    "kind": "arxiv",
    "version": 2
  }
}