Pith Number

pith:L5UXNT6U

pith:2025:L5UXNT6UTOTBM6FOJKUTXCPMRF

not attested not anchored not stored refs pending

A Scenario-Oriented Survey of Federated Recommender Systems: Techniques, Challenges, and Future Directions

Guoshuai Zhao, Jiakui Shen, Jialie Shen, Xueming Qian, Yunqi Mi

arxiv:2508.19620 v1 · 2025-08-27 · cs.IR · cs.AI · cs.CR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{L5UXNT6UTOTBM6FOJKUTXCPMRF}

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	2026-07-05T12:00:15.223106Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5f6976cfd49ba61678ae4aa93b89ec897287d2a7471e7e1e796de72fa5a5e37d

Aliases

arxiv: 2508.19620 · arxiv_version: 2508.19620v1 · doi: 10.48550/arxiv.2508.19620 · pith_short_12: L5UXNT6UTOTB · pith_short_16: L5UXNT6UTOTBM6FO · pith_short_8: L5UXNT6U

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/L5UXNT6UTOTBM6FOJKUTXCPMRF \
  | 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: 5f6976cfd49ba61678ae4aa93b89ec897287d2a7471e7e1e796de72fa5a5e37d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "67c3bc57e82696f71660cf775b75ead90c797261a8d792d647dfe2694dcf0bec",
    "cross_cats_sorted": [
      "cs.AI",
      "cs.CR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2025-08-27T06:57:50Z",
    "title_canon_sha256": "20419de54fe8c4f15bacf3e6e99905131302d08c09886f14af8c0cd9481f61e7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2508.19620",
    "kind": "arxiv",
    "version": 1
  }
}