Pith Number

pith:EGQ5U5C4

pith:2019:EGQ5U5C4RWB3YUBCSZEMKG57S6

not attested not anchored not stored refs pending

Answer Interaction in Non-factoid Question Answering Systems

Bruce Croft, Chen Qu, Falk Scholer, Liu Yang, Yongfeng Zhang

arxiv:1901.03491 v2 · 2019-01-11 · cs.IR · cs.CL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EGQ5U5C4RWB3YUBCSZEMKG57S6}

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	2026-05-17T23:56:22.662693Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

21a1da745c8d83bc50229648c51bbf9793cd46e3d7b91971db91036e6a48afdd

Aliases

arxiv: 1901.03491 · arxiv_version: 1901.03491v2 · doi: 10.48550/arxiv.1901.03491 · pith_short_12: EGQ5U5C4RWB3 · pith_short_16: EGQ5U5C4RWB3YUBC · pith_short_8: EGQ5U5C4

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/EGQ5U5C4RWB3YUBCSZEMKG57S6 \
  | 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: 21a1da745c8d83bc50229648c51bbf9793cd46e3d7b91971db91036e6a48afdd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b7fa4f6504b05523ce66d5c9d6e649664f108c7ea11d37cbb854169dac400d14",
    "cross_cats_sorted": [
      "cs.CL"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2019-01-11T06:02:22Z",
    "title_canon_sha256": "23cbaff188565ece5825b912de7db59643b7e467516dd5c11bd7ee4dcdcf65f3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.03491",
    "kind": "arxiv",
    "version": 2
  }
}