Pith Number

pith:CG6KASEP

pith:2014:CG6KASEPQMHTCZJAX4PYJPEVN4

not attested not anchored not stored refs pending

Preconditioning of Active-Set Newton Methods for PDE-constrained Optimal Control Problems

Margherita Porcelli, Mattia Tani, Valeria Simoncini

arxiv:1407.1144 v3 · 2014-07-04 · math.NA · 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{CG6KASEPQMHTCZJAX4PYJPEVN4}

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	2026-05-18T02:03:52.807622Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

11bca0488f830f316520bf1f84bc956f39ef4d376c77c7170caa2cfecbb2f6dc

Aliases

arxiv: 1407.1144 · arxiv_version: 1407.1144v3 · doi: 10.48550/arxiv.1407.1144 · pith_short_12: CG6KASEPQMHT · pith_short_16: CG6KASEPQMHTCZJA · pith_short_8: CG6KASEP

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/CG6KASEPQMHTCZJAX4PYJPEVN4 \
  | 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: 11bca0488f830f316520bf1f84bc956f39ef4d376c77c7170caa2cfecbb2f6dc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6dd4402f65eaeef5c1309556a6b3a5b21528f8ac08bfc04e7f5dc264e97a3681",
    "cross_cats_sorted": [
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2014-07-04T07:44:07Z",
    "title_canon_sha256": "76fc8e206ef7bd33809017e9e708470720e984ad0e693bcde0e271503002bd15"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1407.1144",
    "kind": "arxiv",
    "version": 3
  }
}