Pith Number

pith:VJPSS5AR

pith:2009:VJPSS5AR226SPONSEFCZ5LSYX4

not attested not anchored not stored refs pending

Joint-sparse recovery from multiple measurements

Ewout van den Berg, Michael P. Friedlander

arxiv:0904.2051 v1 · 2009-04-14 · 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{VJPSS5AR226SPONSEFCZ5LSYX4}

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	2026-05-18T00:07:33.548329Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

aa5f297411d6bd27b9b221459eae58bf05438bc76c9e33bd58d5524a26420853

Aliases

arxiv: 0904.2051 · arxiv_version: 0904.2051v1 · doi: 10.48550/arxiv.0904.2051 · pith_short_12: VJPSS5AR226S · pith_short_16: VJPSS5AR226SPONS · pith_short_8: VJPSS5AR

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/VJPSS5AR226SPONSEFCZ5LSYX4 \
  | 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: aa5f297411d6bd27b9b221459eae58bf05438bc76c9e33bd58d5524a26420853

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f15e77cd4e8265efecf64045f75b45084a716a319ce6cbaacfcd334e17df64d3",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://creativecommons.org/licenses/by/3.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2009-04-14T05:54:33Z",
    "title_canon_sha256": "ffad5c1e3c10747dce7f971d7b1112d5bfa3ebd2a51776cb2b5e145fe6804eb7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.2051",
    "kind": "arxiv",
    "version": 1
  }
}