Pith Number

pith:QZJ6UYSM

pith:2012:QZJ6UYSM5IUKOLSX5DXQBZGHRW

not attested not anchored not stored refs pending

MSS: MATLAB Software for L-BFGS Trust-Region Subproblems for Large-Scale Optimization

Jennifer B. Erway, Roummel F. Marcia

arxiv:1212.1525 v2 · 2012-12-07 · 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{QZJ6UYSM5IUKOLSX5DXQBZGHRW}

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	2026-05-18T03:18:20.356884Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8653ea624cea28a72e57e8ef00e4c78dac156b9eb8e62af17bf6ace1efc5fee3

Aliases

arxiv: 1212.1525 · arxiv_version: 1212.1525v2 · doi: 10.48550/arxiv.1212.1525 · pith_short_12: QZJ6UYSM5IUK · pith_short_16: QZJ6UYSM5IUKOLSX · pith_short_8: QZJ6UYSM

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/QZJ6UYSM5IUKOLSX5DXQBZGHRW \
  | 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: 8653ea624cea28a72e57e8ef00e4c78dac156b9eb8e62af17bf6ace1efc5fee3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "86554f1df5ca73343eb50b3576588890761676af131a255547bb9b28fce0c50e",
    "cross_cats_sorted": [
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2012-12-07T03:19:27Z",
    "title_canon_sha256": "33440b33d0b71176246e59605b8134da5559778cd0bd4bcb5174ac917f923cbc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.1525",
    "kind": "arxiv",
    "version": 2
  }
}