Pith Number

pith:7UPW2ZHB

pith:2012:7UPW2ZHBWPLCYK3XYQI6LGZGXA

not attested not anchored not stored refs pending

A Large Population Size Can Be Unhelpful in Evolutionary Algorithms

Guoliang Chen, Ke Tang, Tianshi Chen, Xin Yao

arxiv:1208.2345 v1 · 2012-08-11 · 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{7UPW2ZHBWPLCYK3XYQI6LGZGXA}

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	2026-05-18T03:48:58.125592Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fd1f6d64e1b3d62c2b77c411e59b26b803bf8358e8a27eb5877009bf0207cfe5

Aliases

arxiv: 1208.2345 · arxiv_version: 1208.2345v1 · doi: 10.48550/arxiv.1208.2345 · pith_short_12: 7UPW2ZHBWPLC · pith_short_16: 7UPW2ZHBWPLCYK3X · pith_short_8: 7UPW2ZHB

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/7UPW2ZHBWPLCYK3XYQI6LGZGXA \
  | 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: fd1f6d64e1b3d62c2b77c411e59b26b803bf8358e8a27eb5877009bf0207cfe5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1d9a4e2603dcc4198f625591e4c6bca4c585caca0721719b2a9de06288d0627c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.NE",
    "submitted_at": "2012-08-11T13:55:53Z",
    "title_canon_sha256": "212d3b7ad4ea6f03deb986b7bfc72625d1f28e85f9b5f8a16e0d13f58024df7a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.2345",
    "kind": "arxiv",
    "version": 1
  }
}