Pith Number

pith:4J2CH4ZC

pith:2011:4J2CH4ZCPF3AZHR6MNXGKCK2ST

not attested not anchored not stored refs pending

Simultaneous Codeword Optimization (SimCO) for Dictionary Update and Learning

Tao Xu, Wei Dai, Wenwu Wang

arxiv:1109.5302 v3 · 2011-09-24 · cs.LG · 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{4J2CH4ZCPF3AZHR6MNXGKCK2ST}

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	2026-05-17T23:39:59.132451Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e27423f32279760c9e3e636e65095a94c89e7c92d045dd096581c0c634c2a612

Aliases

arxiv: 1109.5302 · arxiv_version: 1109.5302v3 · doi: 10.48550/arxiv.1109.5302 · pith_short_12: 4J2CH4ZCPF3A · pith_short_16: 4J2CH4ZCPF3AZHR6 · pith_short_8: 4J2CH4ZC

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/4J2CH4ZCPF3AZHR6MNXGKCK2ST \
  | 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: e27423f32279760c9e3e636e65095a94c89e7c92d045dd096581c0c634c2a612

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8d0f0cf918c622a27999cd73604b06dc99ed765f368943d1e288eaac72329ae2",
    "cross_cats_sorted": [
      "cs.IT",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2011-09-24T20:32:42Z",
    "title_canon_sha256": "0a3d5d303d683e44a7e367dc3ee77f6eed378db2e923055d1342582745b2a306"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.5302",
    "kind": "arxiv",
    "version": 3
  }
}