Pith Number

pith:FAH33SYV

pith:2008:FAH33SYVQIXC26HBMOXWZ7NN2E

not attested not anchored not stored refs pending

Manifolds of semi-negative curvature

Cristian Conde, Gabriel Larotonda

arxiv:0810.4562 v1 · 2008-10-25 · math.DG · math.OA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FAH33SYVQIXC26HBMOXWZ7NN2E}

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	2026-05-18T02:58:10.997403Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

280fbdcb15822e2d78e163af6cfdadd13cb7716d9be32134a6e0b277bfce0251

Aliases

arxiv: 0810.4562 · arxiv_version: 0810.4562v1 · doi: 10.48550/arxiv.0810.4562 · pith_short_12: FAH33SYVQIXC · pith_short_16: FAH33SYVQIXC26HB · pith_short_8: FAH33SYV

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/FAH33SYVQIXC26HBMOXWZ7NN2E \
  | 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: 280fbdcb15822e2d78e163af6cfdadd13cb7716d9be32134a6e0b277bfce0251

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "153f426debf2fef21c4f3ad04a006edc1d3c36cd329222654b6b46ad80700fcc",
    "cross_cats_sorted": [
      "math.OA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2008-10-25T03:55:02Z",
    "title_canon_sha256": "a6919b66bf6ec4e3f051d19158780bfb488e50fbee7a72f8b526a2c9525bddfc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0810.4562",
    "kind": "arxiv",
    "version": 1
  }
}