Pith Number

pith:VOERQFRE

pith:2015:VOERQFRE2MS2SDE2C5XJEGJ2G4

not attested not anchored not stored refs pending

Chemical Reaction Optimization for the Set Covering Problem

Albert Y.S. Lam, James J.Q. Yu, Victor O.K. Li

arxiv:1502.00199 v1 · 2015-02-01 · 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{VOERQFRE2MS2SDE2C5XJEGJ2G4}

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	2026-05-18T02:28:06.468925Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ab89181624d325a90c9a176e92193a3737363e8f17917c6d57d6df303828107f

Aliases

arxiv: 1502.00199 · arxiv_version: 1502.00199v1 · doi: 10.48550/arxiv.1502.00199 · pith_short_12: VOERQFRE2MS2 · pith_short_16: VOERQFRE2MS2SDE2 · pith_short_8: VOERQFRE

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/VOERQFRE2MS2SDE2C5XJEGJ2G4 \
  | 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: ab89181624d325a90c9a176e92193a3737363e8f17917c6d57d6df303828107f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "551b7b8108780cff9a2b180a0ff2cf2369e3c278dcdf27c778f53604b7db0522",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.NE",
    "submitted_at": "2015-02-01T04:56:13Z",
    "title_canon_sha256": "d755a109a0405483a5d2b5e761bdf851613619179b1d613926fe9fd34c0fe9c6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.00199",
    "kind": "arxiv",
    "version": 1
  }
}