Pith Number

pith:4KT5ARRG

pith:2009:4KT5ARRG5TVVTJIMOEZUR66XFC

not attested not anchored not stored refs pending

A Fast Algorithm for the Constrained Formulation of Compressive Image Reconstruction and Other Linear Inverse Problems

Jose M. Bioucas-Dias, Manya V. Afonso, Mario A. T. Figueiredo

arxiv:0909.3947 v1 · 2009-09-22 · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4KT5ARRG5TVVTJIMOEZUR66XFC}

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	2026-05-18T00:59:11.238458Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e2a7d04626eceb59a50c713348fbd728a606220c271eddde863bb62e374145e5

Aliases

arxiv: 0909.3947 · arxiv_version: 0909.3947v1 · doi: 10.48550/arxiv.0909.3947 · pith_short_12: 4KT5ARRG5TVV · pith_short_16: 4KT5ARRG5TVVTJIM · pith_short_8: 4KT5ARRG

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/4KT5ARRG5TVVTJIMOEZUR66XFC \
  | 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: e2a7d04626eceb59a50c713348fbd728a606220c271eddde863bb62e374145e5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7cceef4ffdf3a48f1b7c469e8e074468c0919c564b91829f14f68f98a5e00e5a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2009-09-22T10:03:01Z",
    "title_canon_sha256": "fbe184a108bcd24633dac10b2145e97fe2ec0c5654e9462036971d1204937451"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.3947",
    "kind": "arxiv",
    "version": 1
  }
}