Pith Number

pith:CJD2DIGC

pith:2015:CJD2DIGCNFSGGV66OI2QHGRQYN

not attested not anchored not stored refs pending

Quasiperiodicity and non-computability in tilings

Andrei Romashchenko, Bruno Durand

arxiv:1504.06130 v3 · 2015-04-23 · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CJD2DIGCNFSGGV66OI2QHGRQYN}

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	2026-05-18T01:51:24.812909Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1247a1a0c269646357de7235039a30c37872fdbcf55b6644a963aae82d8f9f86

Aliases

arxiv: 1504.06130 · arxiv_version: 1504.06130v3 · doi: 10.48550/arxiv.1504.06130 · pith_short_12: CJD2DIGCNFSG · pith_short_16: CJD2DIGCNFSGGV66 · pith_short_8: CJD2DIGC

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/CJD2DIGCNFSGGV66OI2QHGRQYN \
  | 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: 1247a1a0c269646357de7235039a30c37872fdbcf55b6644a963aae82d8f9f86

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "34f46e9b8b7f1e27f001a4fc65955b43ada5dba1657f492423c122ed3684f3fe",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2015-04-23T11:39:57Z",
    "title_canon_sha256": "7be5115815019b486c86920fd33be6a096756bb568ef9e57e926f2efb175373c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.06130",
    "kind": "arxiv",
    "version": 3
  }
}