Pith Number

pith:OFAFFMTJ

pith:2021:OFAFFMTJK7LB7PWOHEYODRXSTF

not attested not anchored not stored refs pending

Topology Optimization with linearized buckling criteria in 250 lines of Matlab

Federico Ferrari, James K. Guest, Ole Sigmund

arxiv:2101.02973 v1 · 2021-01-08 · math.OC · cs.CE · cs.NA · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OFAFFMTJK7LB7PWOHEYODRXSTF}

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	2026-07-05T02:09:56.144019Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

714052b26957d61fbece3930e1c6f299677ba1df26ebfdcccf419afa69c0c827

Aliases

arxiv: 2101.02973 · arxiv_version: 2101.02973v1 · doi: 10.48550/arxiv.2101.02973 · pith_short_12: OFAFFMTJK7LB · pith_short_16: OFAFFMTJK7LB7PWO · pith_short_8: OFAFFMTJ

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/OFAFFMTJK7LB7PWOHEYODRXSTF \
  | 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: 714052b26957d61fbece3930e1c6f299677ba1df26ebfdcccf419afa69c0c827

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cba539086c9ccd546b4498c20c13a40bc58fc269f5588c75d6d909890cfd0a1a",
    "cross_cats_sorted": [
      "cs.CE",
      "cs.NA",
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2021-01-08T11:55:24Z",
    "title_canon_sha256": "2da6b8ade60a79702c92a2829b0eea2883417ec938f8208a181fc8b9b854b53e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2101.02973",
    "kind": "arxiv",
    "version": 1
  }
}