Pith Number

pith:NM2LHIRP

pith:2012:NM2LHIRP42QWHDGUMABW3V325U

not attested not anchored not stored refs pending

Computational topology with Regina: Algorithms, heuristics and implementations

Benjamin A. Burton

arxiv:1208.2504 v2 · 2012-08-13 · math.GT · cs.CG · cs.MS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NM2LHIRP42QWHDGUMABW3V325U}

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	2026-05-18T03:32:47.549064Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6b34b3a22fe6a1638cd460036dd77aed35dfb0f62eaf9461e90b5bede60f1de5

Aliases

arxiv: 1208.2504 · arxiv_version: 1208.2504v2 · doi: 10.48550/arxiv.1208.2504 · pith_short_12: NM2LHIRP42QW · pith_short_16: NM2LHIRP42QWHDGU · pith_short_8: NM2LHIRP

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/NM2LHIRP42QWHDGUMABW3V325U \
  | 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: 6b34b3a22fe6a1638cd460036dd77aed35dfb0f62eaf9461e90b5bede60f1de5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "42097102362ac3cd64f110b6d443a87e03fa31d430614d313820c8cf5c5b206e",
    "cross_cats_sorted": [
      "cs.CG",
      "cs.MS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2012-08-13T06:22:37Z",
    "title_canon_sha256": "5a4eb087bc25797d84406a5e6667e4e11b4db27d2009405c46b30d2a376f1890"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.2504",
    "kind": "arxiv",
    "version": 2
  }
}