Pith Number

pith:PGVT4FVO

pith:2021:PGVT4FVOZJMD2CIMT3KQESIQF5

not attested not anchored not stored refs pending

Asking Questions Like Educational Experts: Automatically Generating Question-Answer Pairs on Real-World Examination Data

Fanyi Qu, Xin Jia, Yunfang Wu

arxiv:2109.05179 v2 · 2021-09-11 · 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{PGVT4FVOZJMD2CIMT3KQESIQF5}

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	2026-07-05T03:15:12.144493Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

79ab3e16aeca583d090c9ed50249102f576c01cbcc892261aafaef035af4f44e

Aliases

arxiv: 2109.05179 · arxiv_version: 2109.05179v2 · doi: 10.48550/arxiv.2109.05179 · pith_short_12: PGVT4FVOZJMD · pith_short_16: PGVT4FVOZJMD2CIM · pith_short_8: PGVT4FVO

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/PGVT4FVOZJMD2CIMT3KQESIQF5 \
  | 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: 79ab3e16aeca583d090c9ed50249102f576c01cbcc892261aafaef035af4f44e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "06c5c0041e644ce0d8133cb981fa45a603329ac866ddf45149f745ec8621a06c",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2021-09-11T04:10:57Z",
    "title_canon_sha256": "35a9d72d7cf6f3099862d13128a948050080280ffa01c0f125bc8b7f1a9a4f29"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.05179",
    "kind": "arxiv",
    "version": 2
  }
}