Pith Number

pith:PWG7SGFV

pith:2008:PWG7SGFVMPGCVIPEDO57BPAQAY

not attested not anchored not stored refs pending

Normal forms for pseudo-Riemannian 2-dimensional metrics whose geodesic flows admit integrals quadratic in momenta

Alexey V. Bolsinov, Giuseppe Pucacco, Vladimir S. Matveev

arxiv:0803.0289 v2 · 2008-03-03 · math-ph · math.MP · nlin.SI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PWG7SGFVMPGCVIPEDO57BPAQAY}

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	2026-05-18T02:16:00.649683Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7d8df918b563cc2aa1e41bbbf0bc100601e9e7ea244ee8ae02caa5fbfc863410

Aliases

arxiv: 0803.0289 · arxiv_version: 0803.0289v2 · doi: 10.48550/arxiv.0803.0289 · pith_short_12: PWG7SGFVMPGC · pith_short_16: PWG7SGFVMPGCVIPE · pith_short_8: PWG7SGFV

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/PWG7SGFVMPGCVIPEDO57BPAQAY \
  | 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: 7d8df918b563cc2aa1e41bbbf0bc100601e9e7ea244ee8ae02caa5fbfc863410

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d6300b66f99123c0c6e6ba63fd5c4cdeb42c3aa9c8c81cb238fbf507e1047cd1",
    "cross_cats_sorted": [
      "math.MP",
      "nlin.SI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math-ph",
    "submitted_at": "2008-03-03T17:18:51Z",
    "title_canon_sha256": "9975b9acf48d44e8ff1b9531e3715778b5e844ac9e619c37e101c480f7788b79"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0803.0289",
    "kind": "arxiv",
    "version": 2
  }
}