Pith Number

pith:QQQEPYIZ

pith:2004:QQQEPYIZLTVJNQVNCPJY4DFVJO

not attested not anchored not stored refs pending

A philosophical essay on life and its connections with genetic algorithms

Fernando G. Lobo

arxiv:cs/0402050 v1 · 2004-02-20 · 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{QQQEPYIZLTVJNQVNCPJY4DFVJO}

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	2026-05-18T01:06:49.315426Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

842047e1195cea96c2ad13d38e0cb54bb98566b343abb1526ac397cc08fbf0f1

Aliases

arxiv: cs/0402050 · arxiv_version: cs/0402050v1 · doi: 10.48550/arxiv.cs/0402050 · pith_short_12: QQQEPYIZLTVJ · pith_short_16: QQQEPYIZLTVJNQVN · pith_short_8: QQQEPYIZ

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/QQQEPYIZLTVJNQVNCPJY4DFVJO \
  | 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: 842047e1195cea96c2ad13d38e0cb54bb98566b343abb1526ac397cc08fbf0f1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "246e4cc80e7064562b201446b5ef33758f4cf6e5da4777410a4731b11c84b245",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "cs.NE",
    "submitted_at": "2004-02-20T16:52:11Z",
    "title_canon_sha256": "fa39df30a1acac555fbf817554e9e7a35c8e5a631d96a2170be5758dc788bc16"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cs/0402050",
    "kind": "arxiv",
    "version": 1
  }
}