Pith Number

pith:2TCLXG7C

pith:2021:2TCLXG7C6MER5B7JYR2MBCO5VM

not attested not anchored not stored refs pending

A Reverse Augmented Constraint preconditioner for Lagrange multiplier methods in contact mechanics

Andrea Franceschini, Carlo Janna, Massimiliano Ferronato, Matteo Frigo

arxiv:2111.05599 v1 · 2021-11-10 · math.NA · cs.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{2TCLXG7C6MER5B7JYR2MBCO5VM}

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	2026-06-01T01:02:10.897565Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d4c4bb9be2f3091e87e9c474c089ddab106db871811bd8c4535c176b42683a40

Aliases

arxiv: 2111.05599 · arxiv_version: 2111.05599v1 · doi: 10.48550/arxiv.2111.05599 · pith_short_12: 2TCLXG7C6MER · pith_short_16: 2TCLXG7C6MER5B7J · pith_short_8: 2TCLXG7C

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/2TCLXG7C6MER5B7JYR2MBCO5VM \
  | 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: d4c4bb9be2f3091e87e9c474c089ddab106db871811bd8c4535c176b42683a40

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8fa879ac12359847649c99fc9c5ad0d564ad91c99abcab6cdba85cebe76443d7",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2021-11-10T09:45:09Z",
    "title_canon_sha256": "17423961798676ecc399a066693a5d10c76ccd06b598f59dd56b2347049135f7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2111.05599",
    "kind": "arxiv",
    "version": 1
  }
}