Pith Number

pith:JNAL2YMV

pith:2009:JNAL2YMVUVE4DUEYPT2BVLDQE3

not attested not anchored not stored refs pending

Verifiable conditions of $\ell_1$-recovery of sparse signals with sign restrictions

Anatoli Iouditski (LJK), Arkadii S. Nemirovski (ISyE), Fatma Kilinc Karzan (ISyE)

arxiv:0904.0068 v2 · 2009-04-01 · math.ST · math.OC · stat.TH

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JNAL2YMVUVE4DUEYPT2BVLDQE3}

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	2026-05-18T03:51:48.960661Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4b40bd6195a549c1d0987cf41aac7026ec0241fd439fd0afcbd532055f8b6bb0

Aliases

arxiv: 0904.0068 · arxiv_version: 0904.0068v2 · doi: 10.48550/arxiv.0904.0068 · pith_short_12: JNAL2YMVUVE4 · pith_short_16: JNAL2YMVUVE4DUEY · pith_short_8: JNAL2YMV

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/JNAL2YMVUVE4DUEYPT2BVLDQE3 \
  | 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: 4b40bd6195a549c1d0987cf41aac7026ec0241fd439fd0afcbd532055f8b6bb0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8b704180adc410e51c747b0a179d1d9a2d4f32549fe54e69739b40b26ff9af90",
    "cross_cats_sorted": [
      "math.OC",
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.ST",
    "submitted_at": "2009-04-01T06:22:57Z",
    "title_canon_sha256": "68da8d2c27f669427e986cd1ef4be54f33ece9bdff9451f2c1979797b24700e2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.0068",
    "kind": "arxiv",
    "version": 2
  }
}