Pith Number

pith:WPZPCK5J

pith:2008:WPZPCK5JXDUC7KVNAHPFHLWPFD

not attested not anchored not stored refs pending

Are complex systems hard to evolve?

Andy Adamatzky, Larry Bull

arxiv:0802.3875 v1 · 2008-02-26 · cs.NE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WPZPCK5JXDUC7KVNAHPFHLWPFD}

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	2026-05-18T04:35:05.750057Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b3f2f12ba9b8e82faaad01de53aecf28e3e4eade77b398c17d8f555ed447c130

Aliases

arxiv: 0802.3875 · arxiv_version: 0802.3875v1 · doi: 10.48550/arxiv.0802.3875 · pith_short_12: WPZPCK5JXDUC · pith_short_16: WPZPCK5JXDUC7KVN · pith_short_8: WPZPCK5J

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/WPZPCK5JXDUC7KVNAHPFHLWPFD \
  | 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: b3f2f12ba9b8e82faaad01de53aecf28e3e4eade77b398c17d8f555ed447c130

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b13f0784d851d38ba298af556bd9799ed74faeedb446ead78f8c37ce8f7cdc21",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.NE",
    "submitted_at": "2008-02-26T19:07:53Z",
    "title_canon_sha256": "4448a75b03c3f8a5810a6743df38f5e8afbff87d155ecbdcd54b8bbc09fe08ec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0802.3875",
    "kind": "arxiv",
    "version": 1
  }
}