Pith Number

pith:FQIHQW2P

pith:2020:FQIHQW2PTMBRDLISF6PCP6PCJH

not attested not anchored not stored refs pending

A new generation 99 line Matlab code for compliance Topology Optimization and its extension to 3D

Federico Ferrari, Ole Sigmund

arxiv:2005.05436 v2 · 2020-05-05 · cs.CE · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FQIHQW2PTMBRDLISF6PCP6PCJH}

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	2026-07-05T01:22:45.992913Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2c10785b4f9b0311ad122f9e27f9e249cd7a580d6f31caf486dad747c2b4868f

Aliases

arxiv: 2005.05436 · arxiv_version: 2005.05436v2 · doi: 10.48550/arxiv.2005.05436 · pith_short_12: FQIHQW2PTMBR · pith_short_16: FQIHQW2PTMBRDLIS · pith_short_8: FQIHQW2P

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/FQIHQW2PTMBRDLISF6PCP6PCJH \
  | 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: 2c10785b4f9b0311ad122f9e27f9e249cd7a580d6f31caf486dad747c2b4868f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3ce74ff9fefe537cec09eaed92aa7254050f49277a201a821282ca0e883aeb65",
    "cross_cats_sorted": [
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CE",
    "submitted_at": "2020-05-05T14:32:52Z",
    "title_canon_sha256": "968433785cbdf91988b45476660501f1df4d189aef35c38843648371fbe854ed"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2005.05436",
    "kind": "arxiv",
    "version": 2
  }
}