Pith Number

pith:2MTVDEDX

pith:2021:2MTVDEDXHUBP2FH2UOTOEWPAU6

not attested not anchored not stored refs pending

Unsupervised Open-Domain Question Answering

Hai Zhao, Jian Li, Pengfei Zhu, Xiaoguang Li

arxiv:2108.13817 v1 · 2021-08-31 · 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{2MTVDEDXHUBP2FH2UOTOEWPAU6}

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	2026-07-05T03:10:18.012128Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d3275190773d02fd14faa3a6e259e0a798f23a52e1d5f78563308b4ed014a856

Aliases

arxiv: 2108.13817 · arxiv_version: 2108.13817v1 · doi: 10.48550/arxiv.2108.13817 · pith_short_12: 2MTVDEDXHUBP · pith_short_16: 2MTVDEDXHUBP2FH2 · pith_short_8: 2MTVDEDX

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/2MTVDEDXHUBP2FH2UOTOEWPAU6 \
  | 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: d3275190773d02fd14faa3a6e259e0a798f23a52e1d5f78563308b4ed014a856

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8e1353a9c5fed3e75c3a4892bc94ceb60756f597af9270123cbb36c2e814d090",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2021-08-31T13:19:52Z",
    "title_canon_sha256": "37200d05abec2b6d10fc42bc8ca668fa259b912e0d23676ee320e1b686919140"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2108.13817",
    "kind": "arxiv",
    "version": 1
  }
}