Pith Number

pith:EGAJSOZN

pith:1999:EGAJSOZNA35V45ESAFK2FPZUIP

not attested not anchored not stored refs pending

Perimeter and Coherence According to McCammond and Wise

Peter Brinkmann

arxiv:math/9906010 v2 · 1999-06-02 · math.GR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EGAJSOZNA35V45ESAFK2FPZUIP}

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	2026-05-18T02:35:38.363678Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2180993b2d06fb5e74920155a2bf3443f290870b8ef271097ed6221243611f7d

Aliases

arxiv: math/9906010 · arxiv_version: math/9906010v2 · doi: 10.48550/arxiv.math/9906010 · pith_short_12: EGAJSOZNA35V · pith_short_16: EGAJSOZNA35V45ES · pith_short_8: EGAJSOZN

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/EGAJSOZNA35V45ESAFK2FPZUIP \
  | 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: 2180993b2d06fb5e74920155a2bf3443f290870b8ef271097ed6221243611f7d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e8eb6ed7b64a81b29a3f52dd664d8b6a1b3be0ab855c245313998c39d5aa174a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.GR",
    "submitted_at": "1999-06-02T04:21:45Z",
    "title_canon_sha256": "bc5ea6993abcb487cbbedbc1fe0d2398b5be6986104a9ac17e7937b3d87ee262"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/9906010",
    "kind": "arxiv",
    "version": 2
  }
}