Pith Number

pith:4BUUQGPV

pith:2019:4BUUQGPVDDATEODTWWRCVZD4XL

not attested not anchored not stored refs pending

Guiding Extractive Summarization with Question-Answering Rewards

Fei Liu, Kristjan Arumae

arxiv:1904.02321 v1 · 2019-04-04 · 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{4BUUQGPVDDATEODTWWRCVZD4XL}

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	2026-05-17T23:49:23.952829Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e0694819f518c1323873b5a22ae47cbae743c68f889bd6bb46c32d5686b091df

Aliases

arxiv: 1904.02321 · arxiv_version: 1904.02321v1 · doi: 10.48550/arxiv.1904.02321 · pith_short_12: 4BUUQGPVDDAT · pith_short_16: 4BUUQGPVDDATEODT · pith_short_8: 4BUUQGPV

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/4BUUQGPVDDATEODTWWRCVZD4XL \
  | 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: e0694819f518c1323873b5a22ae47cbae743c68f889bd6bb46c32d5686b091df

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "47d7360b6e7cc145d473426b7128eb0c0d6599f0d0ac2e25464a8cbd857f00e4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2019-04-04T02:57:59Z",
    "title_canon_sha256": "dcb5cc0381e72ea82800122923d2251a96a2164d29c34369a05732caf31a9861"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.02321",
    "kind": "arxiv",
    "version": 1
  }
}