Pith Number

pith:OXGB2KFC

pith:2016:OXGB2KFC4K3U4R4KEYYKNGFWD5

not attested not anchored not stored refs pending

An improved analysis of the ER-SpUD dictionary learning algorithm

Jaros{\l}aw B{\l}asiok, Jelani Nelson

arxiv:1602.05719 v1 · 2016-02-18 · cs.LG · cs.DS · cs.IT · math.IT · math.PR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OXGB2KFC4K3U4R4KEYYKNGFWD5}

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	2026-05-18T01:20:23.431667Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

75cc1d28a2e2b74e478a2630a698b61f48b38aaa2cdc6d6f46c8110e34af0a32

Aliases

arxiv: 1602.05719 · arxiv_version: 1602.05719v1 · doi: 10.48550/arxiv.1602.05719 · pith_short_12: OXGB2KFC4K3U · pith_short_16: OXGB2KFC4K3U4R4K · pith_short_8: OXGB2KFC

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/OXGB2KFC4K3U4R4KEYYKNGFWD5 \
  | 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: 75cc1d28a2e2b74e478a2630a698b61f48b38aaa2cdc6d6f46c8110e34af0a32

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e3d5e5c5473d6afd56550fba3a69fa8654af7f90b46c4255d0c95fa3c4ba953f",
    "cross_cats_sorted": [
      "cs.DS",
      "cs.IT",
      "math.IT",
      "math.PR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2016-02-18T08:51:08Z",
    "title_canon_sha256": "5d3480e65cc60b4b47c99689a4bc3dae29ee9422e619f1e2ff151373dc3ec351"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.05719",
    "kind": "arxiv",
    "version": 1
  }
}