Pith Number

pith:T4OLZD4X

pith:2015:T4OLZD4XIPYFYKQIWMGYDR33FS

not attested not anchored not stored refs pending

Necessary and Sufficient Conditions and a Provably Efficient Algorithm for Separable Topic Discovery

Prakash Ishwar, Venkatesh Saligrama, Weicong Ding

arxiv:1508.05565 v2 · 2015-08-23 · cs.LG · cs.CL · cs.IR · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{T4OLZD4XIPYFYKQIWMGYDR33FS}

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	2026-05-18T01:25:17.876250Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9f1cbc8f9743f05c2a08b30d81c77b2c8de5c6cd27266dd65d0e3ad92923a00a

Aliases

arxiv: 1508.05565 · arxiv_version: 1508.05565v2 · doi: 10.48550/arxiv.1508.05565 · pith_short_12: T4OLZD4XIPYF · pith_short_16: T4OLZD4XIPYFYKQI · pith_short_8: T4OLZD4X

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/T4OLZD4XIPYFYKQIWMGYDR33FS \
  | 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: 9f1cbc8f9743f05c2a08b30d81c77b2c8de5c6cd27266dd65d0e3ad92923a00a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fa1a998cae5261ec734e514274f90690150f40b631e916cf6329e0f1eebc507b",
    "cross_cats_sorted": [
      "cs.CL",
      "cs.IR",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2015-08-23T03:44:26Z",
    "title_canon_sha256": "96c8cd09b5368a07dae58f709af711b57e484776228a2828248603810168bd8e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.05565",
    "kind": "arxiv",
    "version": 2
  }
}