Pith Number

pith:W2PUS3FN

pith:2021:W2PUS3FNUVHTFNC2XDO2PH7CZK

not attested not anchored not stored refs pending

An Unconstrained Convex Formulation of Compliant Contact

Alejandro Castro, Frank Permenter, Xuchen Han

arxiv:2110.10107 v2 · 2021-10-19 · cs.CE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{W2PUS3FNUVHTFNC2XDO2PH7CZK}

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	2026-07-05T04:34:13.735036Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b69f496cada54f32b45ab8dda79fe2ca8fa7e85c02f097f8fa8bf1a61c55b587

Aliases

arxiv: 2110.10107 · arxiv_version: 2110.10107v2 · doi: 10.48550/arxiv.2110.10107 · pith_short_12: W2PUS3FNUVHT · pith_short_16: W2PUS3FNUVHTFNC2 · pith_short_8: W2PUS3FN

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/W2PUS3FNUVHTFNC2XDO2PH7CZK \
  | 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: b69f496cada54f32b45ab8dda79fe2ca8fa7e85c02f097f8fa8bf1a61c55b587

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "18e0d38c351d7dd702f2bd5f5e131429427da4554da551aadc771732ff6db605",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CE",
    "submitted_at": "2021-10-19T17:01:35Z",
    "title_canon_sha256": "318483b2fbc5540fac140032801c02a18dc21a52b84a20762766ddd3f6b3e6a7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2110.10107",
    "kind": "arxiv",
    "version": 2
  }
}