Pith Number

pith:H7ZQQ53K

pith:2004:H7ZQQ53KS6HTLK3BFJ3J5IBJKZ

not attested not anchored not stored refs pending

Computational Topology for Regular Closed Sets

C.M. Hoffmann, D.R. Ferguson, J. Bisceglio, N.F. Stewart, N.M. Patrikalakis, The I-TANGO project: T.J. Peters, T. Maekawa, T. Sakkalis

arxiv:math/0402446 v1 · 2004-02-26 · math.GN

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{H7ZQQ53KS6HTLK3BFJ3J5IBJKZ}

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	2026-05-18T03:47:10.536441Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3ff308776a978f35ab612a769ea029566536732de625f2347e4c8db8b3fd0629

Aliases

arxiv: math/0402446 · arxiv_version: math/0402446v1 · doi: 10.48550/arxiv.math/0402446 · pith_short_12: H7ZQQ53KS6HT · pith_short_16: H7ZQQ53KS6HTLK3B · pith_short_8: H7ZQQ53K

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/H7ZQQ53KS6HTLK3BFJ3J5IBJKZ \
  | 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: 3ff308776a978f35ab612a769ea029566536732de625f2347e4c8db8b3fd0629

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "39acd9fdb965616c7cd8e3aaf16b53cdcf694a85801c5aeb8726b72184698ee5",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.GN",
    "submitted_at": "2004-02-26T22:54:20Z",
    "title_canon_sha256": "a6973f8f1720bf292fb09e4d6e2dfd6659d0df51194b7f82c25eebf95cdef326"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0402446",
    "kind": "arxiv",
    "version": 1
  }
}