Pith Number

pith:ZLI2ZI6V

pith:2024:ZLI2ZI6VAFPCH7ID7VKMYQYBTI

not attested not anchored not stored refs pending

Unsupervised dense retrieval with conterfactual contrastive learning

Fen Lin, Haitian Chen, Qingyao Ai, Qin Liu, Xiao Wang, Yiqun Liu

arxiv:2412.20756 v1 · 2024-12-30 · cs.IR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZLI2ZI6VAFPCH7ID7VKMYQYBTI}

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	2026-07-05T09:55:29.799113Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cad1aca3d5015e23fd03fd54cc43019a2255ca3ced325bc9c049a6d3855e6604

Aliases

arxiv: 2412.20756 · arxiv_version: 2412.20756v1 · doi: 10.48550/arxiv.2412.20756 · pith_short_12: ZLI2ZI6VAFPC · pith_short_16: ZLI2ZI6VAFPCH7ID · pith_short_8: ZLI2ZI6V

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/ZLI2ZI6VAFPCH7ID7VKMYQYBTI \
  | 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: cad1aca3d5015e23fd03fd54cc43019a2255ca3ced325bc9c049a6d3855e6604

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a00414b0c3287b8f1c214c3887ab9983372aeff4e25d9c9b8c195997663abfa1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2024-12-30T07:01:34Z",
    "title_canon_sha256": "670fa0c8d900ac41d20bb56065c0827d8704d8eb8adfb0d5293ab9466c3bdafa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2412.20756",
    "kind": "arxiv",
    "version": 1
  }
}