Pith Number

pith:W22CTPY6

pith:2009:W22CTPY6JLVMZ5CSPLDTGQEIHO

not attested not anchored not stored refs pending

Gallot-Tanno theorem for pseudo-Riemannian metrics and a proof that decomposable cones over closed complete pseudo-Riemannian manifolds do not exist

Vladimir S. Matveev

arxiv:0906.2410 v1 · 2009-06-12 · math.DG · math-ph · 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{W22CTPY6JLVMZ5CSPLDTGQEIHO}

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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	2026-05-18T04:16:12.282202Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b6b429bf1e4aeaccf4527ac73340883b8c178b5a267f0e3b633f83834d9cc600

Aliases

arxiv: 0906.2410 · arxiv_version: 0906.2410v1 · doi: 10.48550/arxiv.0906.2410 · pith_short_12: W22CTPY6JLVM · pith_short_16: W22CTPY6JLVMZ5CS · pith_short_8: W22CTPY6

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/W22CTPY6JLVMZ5CSPLDTGQEIHO \
  | 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: b6b429bf1e4aeaccf4527ac73340883b8c178b5a267f0e3b633f83834d9cc600

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e7136863024b9f9293ed3e82e75c04b4b038d3c22183fa4d32daf7db11b5ed4b",
    "cross_cats_sorted": [
      "math-ph",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2009-06-12T19:56:36Z",
    "title_canon_sha256": "8ff44de23b6a03c8218b055f1b16d1171958b346984e0b8111604d630d3073f8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.2410",
    "kind": "arxiv",
    "version": 1
  }
}