Pith Number

pith:JFD6OB5W

pith:2018:JFD6OB5W5HAX6FIGOYXQI744MI

not attested not anchored not stored refs pending

Interior Point Methods and Preconditioning for PDE-Constrained Optimization Problems Involving Sparsity Terms

John W. Pearson, Margherita Porcelli, Martin Stoll

arxiv:1806.05896 v2 · 2018-06-15 · math.OC · math.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{JFD6OB5W5HAX6FIGOYXQI744MI}

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	2026-05-17T23:54:16.408225Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4947e707b6e9c17f1506762f047f9c623963b8a52dcc22fbad72253dfcab2449

Aliases

arxiv: 1806.05896 · arxiv_version: 1806.05896v2 · doi: 10.48550/arxiv.1806.05896 · pith_short_12: JFD6OB5W5HAX · pith_short_16: JFD6OB5W5HAX6FIG · pith_short_8: JFD6OB5W

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/JFD6OB5W5HAX6FIGOYXQI744MI \
  | 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: 4947e707b6e9c17f1506762f047f9c623963b8a52dcc22fbad72253dfcab2449

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1abf51fed2770fc76abfd12c6678018ba93f689d99e495aaf951bef6b8317d9c",
    "cross_cats_sorted": [
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2018-06-15T10:36:09Z",
    "title_canon_sha256": "047bcdc7a3a2d3b5190f742e91c69e8ad95927b935eca4f24269f96b078dcb31"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.05896",
    "kind": "arxiv",
    "version": 2
  }
}