Pith Number

pith:QALMKJ6V

pith:2014:QALMKJ6VDE7PEPJIB7VDDQKEAT

not attested not anchored not stored refs pending

IMRO: a proximal quasi-Newton method for solving $l_1$-regularized least square problem

Sahar Karimi, Stephen Vavasis

arxiv:1401.4220 v2 · 2014-01-17 · 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{QALMKJ6VDE7PEPJIB7VDDQKEAT}

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	2026-05-17T23:56:56.424220Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8016c527d5193ef23d280fea31c14404fea93fcae31ac68ccb7d124d80bc629e

Aliases

arxiv: 1401.4220 · arxiv_version: 1401.4220v2 · doi: 10.48550/arxiv.1401.4220 · pith_short_12: QALMKJ6VDE7P · pith_short_16: QALMKJ6VDE7PEPJI · pith_short_8: QALMKJ6V

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/QALMKJ6VDE7PEPJIB7VDDQKEAT \
  | 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: 8016c527d5193ef23d280fea31c14404fea93fcae31ac68ccb7d124d80bc629e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c7f864a87ebd137ea2e5f9d90c2bb91873d52534fdeccfc6eaeeee92d426967b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2014-01-17T01:36:36Z",
    "title_canon_sha256": "a0941be4da0ec658abb4277cbd863a005a32beb7db6bea61bb21547bcb1e84f9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.4220",
    "kind": "arxiv",
    "version": 2
  }
}