Pith Number

pith:XUUD2CI2

pith:2021:XUUD2CI2IZ4NDQB5XXZCBNK5QO

not attested not anchored not stored refs pending

Constrained Form-Finding of Tension-Compression Structures using Automatic Differentiation

Patrick Ole Ohlbrock, Pierluigi D'Acunto, Rafael Pastrana, Stefana Parascho, Thomas Oberbichler

arxiv:2111.02607 v2 · 2021-11-04 · 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{XUUD2CI2IZ4NDQB5XXZCBNK5QO}

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	2026-07-05T04:55:37.044228Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bd283d091a4678d1c03dbdf220b55d83a67cbeefe417eb9989dc040300f1699a

Aliases

arxiv: 2111.02607 · arxiv_version: 2111.02607v2 · doi: 10.48550/arxiv.2111.02607 · pith_short_12: XUUD2CI2IZ4N · pith_short_16: XUUD2CI2IZ4NDQB5 · pith_short_8: XUUD2CI2

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/XUUD2CI2IZ4NDQB5XXZCBNK5QO \
  | 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: bd283d091a4678d1c03dbdf220b55d83a67cbeefe417eb9989dc040300f1699a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d9049eb08b47b67b7bed9c4d6435ab5cef9946f7769dac3a50e3f43c80286158",
    "cross_cats_sorted": [
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CE",
    "submitted_at": "2021-11-04T03:27:17Z",
    "title_canon_sha256": "50a60395582c537696346b8dbb389cba9f53aef0057be89143e1db94766c4c48"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2111.02607",
    "kind": "arxiv",
    "version": 2
  }
}