Pith Number

pith:PQ7IC545

pith:2019:PQ7IC545SFV34ADB6SHE6CQYOQ

not attested not anchored not stored refs pending

Population-based metaheuristic optimization in neutron optics and shielding design

C.Zendler, D.D.DiJulio, H.Bj\"orgvinsd\'ottir, P.M.Bentley

arxiv:1908.07221 v1 · 2019-08-20 · physics.comp-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PQ7IC545SFV34ADB6SHE6CQYOQ}

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	2026-07-04T23:58:32.024522Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7c3e81779d916bbe0061f48e4f0a187433b6a6c84c2b1eb97f3160eabb175f1d

Aliases

arxiv: 1908.07221 · arxiv_version: 1908.07221v1 · doi: 10.48550/arxiv.1908.07221 · pith_short_12: PQ7IC545SFV3 · pith_short_16: PQ7IC545SFV34ADB · pith_short_8: PQ7IC545

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/PQ7IC545SFV34ADB6SHE6CQYOQ \
  | 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: 7c3e81779d916bbe0061f48e4f0a187433b6a6c84c2b1eb97f3160eabb175f1d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b2ab526500bc2d5bb8e7c0b32ff313873b9dc0c74c44e3c68adb75ea12939523",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.comp-ph",
    "submitted_at": "2019-08-20T08:37:09Z",
    "title_canon_sha256": "91cbb7ee5b4e43ec135df5b19d3c8663845a91008b2054368861dce77ac8d924"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.07221",
    "kind": "arxiv",
    "version": 1
  }
}