Pith Number

pith:C4IDGLXI

pith:2019:C4IDGLXIBI34R7NB4X4JMPQKFY

not attested not anchored not stored refs pending

Learning to Generate Questions by Learning What not to Generate

Bang Liu, Di Niu, Haojie Wei, Kunfeng Lai, Mingjun Zhao, Yancheng He, Yu Xu

arxiv:1902.10418 v1 · 2019-02-27 · 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{C4IDGLXIBI34R7NB4X4JMPQKFY}

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	2026-05-17T23:52:30.891039Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1710332ee80a37c8fda1e5f8963e0a2e12950ca0b47723b082de998b4129649c

Aliases

arxiv: 1902.10418 · arxiv_version: 1902.10418v1 · doi: 10.48550/arxiv.1902.10418 · pith_short_12: C4IDGLXIBI34 · pith_short_16: C4IDGLXIBI34R7NB · pith_short_8: C4IDGLXI

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/C4IDGLXIBI34R7NB4X4JMPQKFY \
  | 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: 1710332ee80a37c8fda1e5f8963e0a2e12950ca0b47723b082de998b4129649c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bc4881a7a710a862cf2cb073da611431c49daef3a6b1ec79ccec9fee100a5115",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2019-02-27T09:56:19Z",
    "title_canon_sha256": "26534cdb59103789b26a76f39378d06adef0c582817795379e78c9c5f5b3a2c7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.10418",
    "kind": "arxiv",
    "version": 1
  }
}