Pith Number

pith:N4ABJ2AV

pith:2014:N4ABJ2AVY3DM6L2XSMOV4DFARL

not attested not anchored not stored refs pending

Sparse phase retrieval via group-sparse optimization

Fabien Lauer (LORIA), Henrik Ohlsson

arxiv:1402.5803 v1 · 2014-02-24 · cs.IT · cs.LG · 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{N4ABJ2AVY3DM6L2XSMOV4DFARL}

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	2026-05-18T02:58:13.591932Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6f0014e815c6c6cf2f57931d5e0ca08adbb882d8dd59a51e13cfe99a77a8450f

Aliases

arxiv: 1402.5803 · arxiv_version: 1402.5803v1 · doi: 10.48550/arxiv.1402.5803 · pith_short_12: N4ABJ2AVY3DM · pith_short_16: N4ABJ2AVY3DM6L2X · pith_short_8: N4ABJ2AV

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/N4ABJ2AVY3DM6L2XSMOV4DFARL \
  | 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: 6f0014e815c6c6cf2f57931d5e0ca08adbb882d8dd59a51e13cfe99a77a8450f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cd1dd5ab2935475eeb1fe43496076950886a0f40ca8683152123f580975ea140",
    "cross_cats_sorted": [
      "cs.LG",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2014-02-24T11:55:04Z",
    "title_canon_sha256": "49e68cb856dd93e7555b4ff3a059e087bcf8693eb9112d5a1db155bf7842d9b8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1402.5803",
    "kind": "arxiv",
    "version": 1
  }
}