Pith Number

pith:PLPT2Z5M

pith:2021:PLPT2Z5MRHW7EGT3JKRAYR24W2

not attested not anchored not stored refs pending

A Survey of Deep Reinforcement Learning in Recommender Systems: A Systematic Review and Future Directions

Guanglin Zhou, Julian McAuley, Lina Yao, Xianzhi Wang, Xiaocong Chen

arxiv:2109.03540 v2 · 2021-09-08 · cs.IR · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PLPT2Z5MRHW7EGT3JKRAYR24W2}

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	2026-07-05T03:12:51.510106Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7adf3d67ac89edf21a7b4aa20c475cb6973a0ed3f0706d075dfe7900c8604f95

Aliases

arxiv: 2109.03540 · arxiv_version: 2109.03540v2 · doi: 10.48550/arxiv.2109.03540 · pith_short_12: PLPT2Z5MRHW7 · pith_short_16: PLPT2Z5MRHW7EGT3 · pith_short_8: PLPT2Z5M

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/PLPT2Z5MRHW7EGT3JKRAYR24W2 \
  | 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: 7adf3d67ac89edf21a7b4aa20c475cb6973a0ed3f0706d075dfe7900c8604f95

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e9628bd17ff07973b1beed604379f11e7b35f79cbd01ec0022cca836c4506938",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2021-09-08T10:44:55Z",
    "title_canon_sha256": "eeadfd6fc832d6f8ebb2f4ccc923572236b5cc3f5ca2341418dd2a8b3b25373f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.03540",
    "kind": "arxiv",
    "version": 2
  }
}