Pith Number

pith:4DBVA7DX

pith:2011:4DBVA7DXDSSJHS5N5OKME7OA4E

not attested not anchored not stored refs pending

Modified Orthogonal Matching Pursuit Algorithm for Cognitive Radio Wideband Spectrum Sensing

Peng Zhang, Robert Qiu

arxiv:1102.2881 v1 · 2011-02-14 · 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{4DBVA7DXDSSJHS5N5OKME7OA4E}

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	2026-05-18T04:28:46.215475Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e0c3507c771ca493cbadeb94c27dc0e1264465496321cbd5a9e09e1ed2eb10f7

Aliases

arxiv: 1102.2881 · arxiv_version: 1102.2881v1 · doi: 10.48550/arxiv.1102.2881 · pith_short_12: 4DBVA7DXDSSJ · pith_short_16: 4DBVA7DXDSSJHS5N · pith_short_8: 4DBVA7DX

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/4DBVA7DXDSSJHS5N5OKME7OA4E \
  | 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: e0c3507c771ca493cbadeb94c27dc0e1264465496321cbd5a9e09e1ed2eb10f7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3614f4539c13a4e720e185f941609682f61cff13f68335277c9fc3d7f58f840e",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2011-02-14T20:43:20Z",
    "title_canon_sha256": "8a4fa7897d85451174020b5920a1f843cf5ffbb8ab7e80e2e7c6dc7249c08a49"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.2881",
    "kind": "arxiv",
    "version": 1
  }
}