Pith Number

pith:OU2QT6XD

pith:2015:OU2QT6XDCDB2AFVEFHIDVGBQDE

not attested not anchored not stored refs pending

Infinite friezes and triangulations of the strip

David Smith

arxiv:1512.05842 v1 · 2015-12-18 · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OU2QT6XDCDB2AFVEFHIDVGBQDE}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T01:24:06.121724Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

753509fae310c3a016a429d03a983019047532a3721b3262e975d3c6ea75e4bb

Aliases

arxiv: 1512.05842 · arxiv_version: 1512.05842v1 · doi: 10.48550/arxiv.1512.05842 · pith_short_12: OU2QT6XDCDB2 · pith_short_16: OU2QT6XDCDB2AFVE · pith_short_8: OU2QT6XD

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/OU2QT6XDCDB2AFVEFHIDVGBQDE \
  | 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: 753509fae310c3a016a429d03a983019047532a3721b3262e975d3c6ea75e4bb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d1d4e6ddf0df11df5ea449cbc69c0dd6873d45b1e8ca4cb47e17d2ae1ccf5f42",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-12-18T02:32:44Z",
    "title_canon_sha256": "e0d38abb877cfcc94b4ba3a3f938c39df4d26a8c4bc9c34d19261cec033e74b2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.05842",
    "kind": "arxiv",
    "version": 1
  }
}