Pith Number

pith:J27LUYD7

pith:2021:J27LUYD7YJAMFUYIKXPL4OOJZL

not attested not anchored not stored refs pending

Challenges in Generalization in Open Domain Question Answering

Linqing Liu, Patrick Lewis, Pontus Stenetorp, Sebastian Riedel

arxiv:2109.01156 v3 · 2021-09-02 · cs.CL · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{J27LUYD7YJAMFUYIKXPL4OOJZL}

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	2026-07-05T04:23:21.479487Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4ebeba607fc240c2d30855debe39c9cae8f249ab13dec68d82054dc4c176c7a1

Aliases

arxiv: 2109.01156 · arxiv_version: 2109.01156v3 · doi: 10.48550/arxiv.2109.01156 · pith_short_12: J27LUYD7YJAM · pith_short_16: J27LUYD7YJAMFUYI · pith_short_8: J27LUYD7

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/J27LUYD7YJAMFUYIKXPL4OOJZL \
  | 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: 4ebeba607fc240c2d30855debe39c9cae8f249ab13dec68d82054dc4c176c7a1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "77389bfe4305e961ad27bd107bf4f348b83c1b54b4aa75045a9624c3166156d5",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2021-09-02T18:04:10Z",
    "title_canon_sha256": "60a325d3f305a6d77dae88514374277a4c7fe560acf0f89c69f4188130c60ec8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.01156",
    "kind": "arxiv",
    "version": 3
  }
}