Pith Number

pith:QQV6C3VX

pith:2009:QQV6C3VXEPWCWNR23A7DVGMAQS

not attested not anchored not stored refs pending

Edge Tessellation and Stamp Foldings Puzzles

Matthew Kirby, Ron Umble

arxiv:0908.3257 v4 · 2009-08-22 · math.GT · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QQV6C3VXEPWCWNR23A7DVGMAQS}

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	2026-05-18T04:14:29.702518Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

842be16eb723ec2b363ad83e3a9980848edba26d28661d6af010131cf8f25ca6

Aliases

arxiv: 0908.3257 · arxiv_version: 0908.3257v4 · doi: 10.48550/arxiv.0908.3257 · pith_short_12: QQV6C3VXEPWC · pith_short_16: QQV6C3VXEPWCWNR2 · pith_short_8: QQV6C3VX

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/QQV6C3VXEPWCWNR23A7DVGMAQS \
  | 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: 842be16eb723ec2b363ad83e3a9980848edba26d28661d6af010131cf8f25ca6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ba4fa74bf7d2d7dadfa367affe5268c1db277950b9b891cf8113523aedb244eb",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2009-08-22T15:10:18Z",
    "title_canon_sha256": "cba9c064da5e6f7bd0d58cdc9fa330cdf31d79e74278997d4ad7f857b93ccbdf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.3257",
    "kind": "arxiv",
    "version": 4
  }
}