Pith Number

pith:EDX3ZY25

pith:2014:EDX3ZY25TZM7P5ITZNTIALVO57

not attested not anchored not stored refs pending

Matrix-Free Solvers for Exact Penalty Subproblems

Frank E. Curtis, Hao Wang, James V. Burke, Jiashan Wang

arxiv:1402.1917 v1 · 2014-02-09 · 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{EDX3ZY25TZM7P5ITZNTIALVO57}

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	2026-05-18T00:53:45.660744Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

20efbce35d9e59f7f513cb66802eaeefda2414c922225da9be8baa43bebbb98c

Aliases

arxiv: 1402.1917 · arxiv_version: 1402.1917v1 · doi: 10.48550/arxiv.1402.1917 · pith_short_12: EDX3ZY25TZM7 · pith_short_16: EDX3ZY25TZM7P5IT · pith_short_8: EDX3ZY25

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/EDX3ZY25TZM7P5ITZNTIALVO57 \
  | 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: 20efbce35d9e59f7f513cb66802eaeefda2414c922225da9be8baa43bebbb98c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a573497c6dbd05728f394b8346bab6a4ddc1d38b5fbdc9509fd19fdff4fc1c4d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2014-02-09T05:54:16Z",
    "title_canon_sha256": "388b9682554fa4280570902219d06c4ba310409023b9f950dc8b28cb180520bd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1402.1917",
    "kind": "arxiv",
    "version": 1
  }
}