Pith Number

pith:OBUPZEQ7

pith:2019:OBUPZEQ7QATCEWOI7HOFWAS4UU

not attested not anchored not stored refs pending

The Simplest Thing That Can Possibly Work: Pseudo-Relevance Feedback Using Text Classification

Jimmy Lin

arxiv:1904.08861 v1 · 2019-04-18 · 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{OBUPZEQ7QATCEWOI7HOFWAS4UU}

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	2026-05-17T23:48:12.722446Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7068fc921f80262259c8f9dc5b025ca52ebb195ddd91fc02a412a52f455d98ea

Aliases

arxiv: 1904.08861 · arxiv_version: 1904.08861v1 · doi: 10.48550/arxiv.1904.08861 · pith_short_12: OBUPZEQ7QATC · pith_short_16: OBUPZEQ7QATCEWOI · pith_short_8: OBUPZEQ7

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/OBUPZEQ7QATCEWOI7HOFWAS4UU \
  | 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: 7068fc921f80262259c8f9dc5b025ca52ebb195ddd91fc02a412a52f455d98ea

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a56e51b56a32cce0721ccdc1fef50f1cc1af835ba2b3ad599cbb8b000a6d7c81",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2019-04-18T16:06:31Z",
    "title_canon_sha256": "e6e1b46e2858c94f4f9a151f698734ae797e3664abf049b98fc30739c5ad2373"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.08861",
    "kind": "arxiv",
    "version": 1
  }
}