Pith Number

pith:U54BNR2B

pith:2017:U54BNR2BQOVYUXWK7M7P2L3JWB

not attested not anchored not stored refs pending

Porcellio scaber algorithm (PSA) for solving constrained optimization problems

Hongliang Guo, Shuai Li, Yinyan Zhang

arxiv:1710.04036 v1 · 2017-10-11 · 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{U54BNR2BQOVYUXWK7M7P2L3JWB}

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	2026-05-18T00:33:05.236848Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a77816c74183ab8a5ecafb3efd2f69b0434f2453abaa0204710c5c041ea9247f

Aliases

arxiv: 1710.04036 · arxiv_version: 1710.04036v1 · doi: 10.48550/arxiv.1710.04036 · pith_short_12: U54BNR2BQOVY · pith_short_16: U54BNR2BQOVYUXWK · pith_short_8: U54BNR2B

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/U54BNR2BQOVYUXWK7M7P2L3JWB \
  | 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: a77816c74183ab8a5ecafb3efd2f69b0434f2453abaa0204710c5c041ea9247f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "33a306861e1ed09aba8c7181f654af4b9bb83955ad0d66bd9f54f2a8f07d18d6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.NE",
    "submitted_at": "2017-10-11T12:38:59Z",
    "title_canon_sha256": "a5750437110004a31771571c011f7d8e77e122026fff562e79410314546e565b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1710.04036",
    "kind": "arxiv",
    "version": 1
  }
}