Pith Number

pith:NXH2BYHS

pith:2015:NXH2BYHSNKWMMKTULWITJONDOD

not attested not anchored not stored refs pending

Sparsification of Matrices and Compressed Sensing

Fintan Hegarty, Padraig \'O Cath\'ain, Yunbin Zhao

arxiv:1506.03523 v4 · 2015-06-11 · 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{NXH2BYHSNKWMMKTULWITJONDOD}

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	2026-05-18T00:23:17.385897Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6dcfa0e0f26aacc62a745d9134b9a370db10e0ed944fd365cba20c73669c6feb

Aliases

arxiv: 1506.03523 · arxiv_version: 1506.03523v4 · doi: 10.48550/arxiv.1506.03523 · pith_short_12: NXH2BYHSNKWM · pith_short_16: NXH2BYHSNKWMMKTU · pith_short_8: NXH2BYHS

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/NXH2BYHSNKWMMKTULWITJONDOD \
  | 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: 6dcfa0e0f26aacc62a745d9134b9a370db10e0ed944fd365cba20c73669c6feb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8b33325453b9938d4d80db31973b9bf77692c70d8413c1df6f8d1f20efa63a61",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2015-06-11T01:05:21Z",
    "title_canon_sha256": "00e517c29c20a457f0599509ecb6667640234b880320cae6b0c8778f4c1271ea"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1506.03523",
    "kind": "arxiv",
    "version": 4
  }
}