Pith Number

pith:7LSEEJ53

pith:2015:7LSEEJ53BXJISF6EHNHUWYB3CB

not attested not anchored not stored refs pending

Top-N recommendations in the presence of sparsity: An NCD-based approach

Athanasios N. Nikolakopoulos, John D. Garofalakis

arxiv:1507.00043 v2 · 2015-06-30 · cs.IR · cs.AI · 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{7LSEEJ53BXJISF6EHNHUWYB3CB}

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	2026-05-18T01:24:39.368784Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fae44227bb0dd28917c43b4f4b603b104dd6d79fae68f57994b96321271184c8

Aliases

arxiv: 1507.00043 · arxiv_version: 1507.00043v2 · doi: 10.48550/arxiv.1507.00043 · pith_short_12: 7LSEEJ53BXJI · pith_short_16: 7LSEEJ53BXJISF6E · pith_short_8: 7LSEEJ53

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/7LSEEJ53BXJISF6EHNHUWYB3CB \
  | 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: fae44227bb0dd28917c43b4f4b603b104dd6d79fae68f57994b96321271184c8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ce6bc46058dbca23004a4372697b8df78ec014aa77f9d8efa44b60bcdbadd56e",
    "cross_cats_sorted": [
      "cs.AI",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2015-06-30T21:34:53Z",
    "title_canon_sha256": "d24cdc04adca6d2c183d9d9621ed4753715c387a6f0f759341a828faa6f5dbad"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.00043",
    "kind": "arxiv",
    "version": 2
  }
}