Pith Number

pith:I4LO34J2

pith:2009:I4LO34J2V4BWQLGBJKGZ4QSQMF

not attested not anchored not stored refs pending

Generalized Contact Structures

Aissa Wade, Yat Sun Poon

arxiv:0912.5314 v1 · 2009-12-29 · math.DG · math.SG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{I4LO34J2V4BWQLGBJKGZ4QSQMF}

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	2026-05-18T02:58:02.510683Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4716edf13aaf03682cc14a8d9e4250616905136900228ebf8f67026e6d9c7fd0

Aliases

arxiv: 0912.5314 · arxiv_version: 0912.5314v1 · doi: 10.48550/arxiv.0912.5314 · pith_short_12: I4LO34J2V4BW · pith_short_16: I4LO34J2V4BWQLGB · pith_short_8: I4LO34J2

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/I4LO34J2V4BWQLGBJKGZ4QSQMF \
  | 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: 4716edf13aaf03682cc14a8d9e4250616905136900228ebf8f67026e6d9c7fd0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1eb3e9229fc0850bf91ceff389a2be7bdaa85d1435a4a2b692387fa3b50bb008",
    "cross_cats_sorted": [
      "math.SG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2009-12-29T14:39:17Z",
    "title_canon_sha256": "4e0b0ff08f42e2a61c17f46827427b4da8a105bcd5c37d26a6ffec1969e3757f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.5314",
    "kind": "arxiv",
    "version": 1
  }
}