Pith Number

pith:NNDI7IWU

pith:2015:NNDI7IWUMIL4VKDDH3WNV67SCZ

not attested not anchored not stored refs pending

An example of degenerate hyperbolicity in a cellular automaton with 3 states

Henryk Fuk\'s, Joel Midgley-Volpato

arxiv:1506.06649 v1 · 2015-06-22 · nlin.CG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NNDI7IWUMIL4VKDDH3WNV67SCZ}

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	2026-05-18T01:41:44.632664Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6b468fa2d46217caa8633eecdafbf2167005bd7f40762d869050445042896e6c

Aliases

arxiv: 1506.06649 · arxiv_version: 1506.06649v1 · doi: 10.48550/arxiv.1506.06649 · pith_short_12: NNDI7IWUMIL4 · pith_short_16: NNDI7IWUMIL4VKDD · pith_short_8: NNDI7IWU

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/NNDI7IWUMIL4VKDDH3WNV67SCZ \
  | 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: 6b468fa2d46217caa8633eecdafbf2167005bd7f40762d869050445042896e6c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a9bbf28c14db0cf67bc8173ed326fb8ae6c8618d45bfe5052930da13a4dee042",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "nlin.CG",
    "submitted_at": "2015-06-22T15:25:43Z",
    "title_canon_sha256": "46c0ad80240beab74d452335ad90bf3ac14437d56cbb0a29358fc84e994e88dc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1506.06649",
    "kind": "arxiv",
    "version": 1
  }
}