Pith Number

pith:VKHZ4NWV

pith:2021:VKHZ4NWV7TSPV6JBC4WUPLIAWX

not attested not anchored not stored refs pending

QA4PRF: A Question Answering based Framework for Pseudo Relevance Feedback

Chenxu Zhu, Handong Ma, Jiawei Hou, Jieming Zhu, Jincai Lai, Ruiming Tang, Weinan Zhang, Xiuqiang He, Yong Yu

arxiv:2111.08229 v1 · 2021-11-16 · 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{VKHZ4NWV7TSPV6JBC4WUPLIAWX}

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	2026-07-05T03:32:31.401381Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

aa8f9e36d5fce4faf921172d47ad00b5da7e0371e069394b46e7db80a065d787

Aliases

arxiv: 2111.08229 · arxiv_version: 2111.08229v1 · doi: 10.48550/arxiv.2111.08229 · pith_short_12: VKHZ4NWV7TSP · pith_short_16: VKHZ4NWV7TSPV6JB · pith_short_8: VKHZ4NWV

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/VKHZ4NWV7TSPV6JBC4WUPLIAWX \
  | 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: aa8f9e36d5fce4faf921172d47ad00b5da7e0371e069394b46e7db80a065d787

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5cf358b2c3cd18facc480cf7aa5180936304554afa5a1dba4035b6c5dffef3dd",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2021-11-16T05:02:30Z",
    "title_canon_sha256": "a60a05a277d41edcb31a31ad9ec702a05a6e9dd66e343b2475ec2ab0590c90b6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2111.08229",
    "kind": "arxiv",
    "version": 1
  }
}