Pith Number

pith:YMRCW2QA

pith:2012:YMRCW2QAKXEIVIBOFJRK3UDVSO

not attested not anchored not stored refs pending

Hessian Schatten-Norm Regularization for Linear Inverse Problems

John Paul Ward, Michael Unser, Stamatios Lefkimmiatis

arxiv:1209.3318 v3 · 2012-09-14 · math.OC · cs.CV · cs.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{YMRCW2QAKXEIVIBOFJRK3UDVSO}

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	2026-05-18T02:58:43.509596Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c3222b6a0055c88aa02e2a62add075938995444621492f54846feabda4608570

Aliases

arxiv: 1209.3318 · arxiv_version: 1209.3318v3 · doi: 10.48550/arxiv.1209.3318 · pith_short_12: YMRCW2QAKXEI · pith_short_16: YMRCW2QAKXEIVIBO · pith_short_8: YMRCW2QA

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/YMRCW2QAKXEIVIBOFJRK3UDVSO \
  | 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: c3222b6a0055c88aa02e2a62add075938995444621492f54846feabda4608570

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2f36efd663248af699f6607d009d6725419d1fe67be6b706eec70b36a3606fd2",
    "cross_cats_sorted": [
      "cs.CV",
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2012-09-14T20:31:06Z",
    "title_canon_sha256": "0b9299df02c10c84e9576fdb8be87a61b80f4036aaeb1e702366cb0a75e0dcdf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.3318",
    "kind": "arxiv",
    "version": 3
  }
}