Pith Number

pith:7HPN2YD5

pith:2013:7HPN2YD5HHTPWHQR6MGFFDRRGZ

not attested not anchored not stored refs pending

l_0 Norm Constraint LMS Algorithm for Sparse System Identification

Jian Jin, Shunliang Mei, Yuantao Gu

arxiv:1303.2261 v1 · 2013-03-09 · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7HPN2YD5HHTPWHQR6MGFFDRRGZ}

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	2026-05-18T01:51:09.255559Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f9dedd607d39e6fb1e11f30c528e31366bfa005a214d063de339b37ef2bd34b7

Aliases

arxiv: 1303.2261 · arxiv_version: 1303.2261v1 · doi: 10.48550/arxiv.1303.2261 · pith_short_12: 7HPN2YD5HHTP · pith_short_16: 7HPN2YD5HHTPWHQR · pith_short_8: 7HPN2YD5

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/7HPN2YD5HHTPWHQR6MGFFDRRGZ \
  | 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: f9dedd607d39e6fb1e11f30c528e31366bfa005a214d063de339b37ef2bd34b7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ac32db9e598a6ccdc5ea19e1bebf09cc42e5bb34b8c28aed04732f3323eb34d5",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2013-03-09T19:44:29Z",
    "title_canon_sha256": "c42219552a2c51516adc464171029401bfd6538a8c5de27844f9fb0df0d4f1a9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.2261",
    "kind": "arxiv",
    "version": 1
  }
}