Pith Number

pith:LD6IN7UZ

pith:2002:LD6IN7UZPUAYQNPWQMEWKEVWAW

not attested not anchored not stored refs pending

Einstein metrics and complex singularities

David M. J. Calderbank, Michael A. Singer

arxiv:math/0206229 v2 · 2002-06-21 · math.DG · hep-th · math-ph · math.AG · math.MP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LD6IN7UZPUAYQNPWQMEWKEVWAW}

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	2026-05-18T01:38:29.540554Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

58fc86fe997d018835f683096512b60595ff760b3891e7a58ab3ec74ec16b395

Aliases

arxiv: math/0206229 · arxiv_version: math/0206229v2 · doi: 10.48550/arxiv.math/0206229 · pith_short_12: LD6IN7UZPUAY · pith_short_16: LD6IN7UZPUAYQNPW · pith_short_8: LD6IN7UZ

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/LD6IN7UZPUAYQNPWQMEWKEVWAW \
  | 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: 58fc86fe997d018835f683096512b60595ff760b3891e7a58ab3ec74ec16b395

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9c56cde27051852c57cdfe0b0757b5f03b51710296cd061f251ef4d9ba61848d",
    "cross_cats_sorted": [
      "hep-th",
      "math-ph",
      "math.AG",
      "math.MP"
    ],
    "license": "",
    "primary_cat": "math.DG",
    "submitted_at": "2002-06-21T13:50:35Z",
    "title_canon_sha256": "2d09ea4b5ef19cf7e2811e549ee90099b853b3ad8eb0905359d078cf4d25fa39"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0206229",
    "kind": "arxiv",
    "version": 2
  }
}