Pith Number

pith:EKJWXSRO

pith:2010:EKJWXSRO4HCH45LKD4NDQ7IKUE

not attested not anchored not stored refs pending

Alternating Direction Algorithms for Constrained Sparse Regression: Application to Hyperspectral Unmixing

Jos\'e M. Bioucas-Dias, M\'ario A. T. Figueiredo

arxiv:1002.4527 v2 · 2010-02-24 · math.OC · math.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{EKJWXSRO4HCH45LKD4NDQ7IKUE}

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	2026-05-18T03:56:08.770469Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

22936bca2ee1c47e756a1f1a387d0aa125ae1722953fdb5f58ce9af579aaec51

Aliases

arxiv: 1002.4527 · arxiv_version: 1002.4527v2 · doi: 10.48550/arxiv.1002.4527 · pith_short_12: EKJWXSRO4HCH · pith_short_16: EKJWXSRO4HCH45LK · pith_short_8: EKJWXSRO

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/EKJWXSRO4HCH45LKD4NDQ7IKUE \
  | 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: 22936bca2ee1c47e756a1f1a387d0aa125ae1722953fdb5f58ce9af579aaec51

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "affa92ede89dbb54b43ccef4e4c624f932327193140972c495f6421c095ef0cc",
    "cross_cats_sorted": [
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2010-02-24T11:46:14Z",
    "title_canon_sha256": "89ae61568ec1879afd500e27dfd2840f0d05ac0d303e9fc213f3b57915afc6ec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1002.4527",
    "kind": "arxiv",
    "version": 2
  }
}