Pith Number

pith:QZKJUU2R

pith:2010:QZKJUU2RLHEKASZHNT6FPXQYC7

not attested not anchored not stored refs pending

Online Sparse System Identification and Signal Reconstruction using Projections onto Weighted $\ell_1$ Balls

Konstantinos Slavakis, Sergios Theodoridis, Yannis Kopsinis

arxiv:1004.3040 v1 · 2010-04-18 · 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{QZKJUU2RLHEKASZHNT6FPXQYC7}

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	2026-05-18T01:29:12.175186Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

86549a535159c8a04b276cfc57de1817e3f5d917a0bd2ab2f85b0de206129477

Aliases

arxiv: 1004.3040 · arxiv_version: 1004.3040v1 · doi: 10.48550/arxiv.1004.3040 · pith_short_12: QZKJUU2RLHEK · pith_short_16: QZKJUU2RLHEKASZH · pith_short_8: QZKJUU2R

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/QZKJUU2RLHEKASZHNT6FPXQYC7 \
  | 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: 86549a535159c8a04b276cfc57de1817e3f5d917a0bd2ab2f85b0de206129477

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8ab22c66ab366ae7d70a65bb056d705bca69b44d3c1ce71bc8044b23b9c949cc",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2010-04-18T17:13:06Z",
    "title_canon_sha256": "c0fdec1e69b4d3d7e18913c3b7f4789f8d3f01e05ac05994e1aaea021b137e73"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1004.3040",
    "kind": "arxiv",
    "version": 1
  }
}