Pith Number

pith:DDBVEMHL

pith:2020:DDBVEMHLORTT6BOJCM6ECHBHE5

not attested not anchored not stored refs pending

Covidex: Neural Ranking Models and Keyword Search Infrastructure for the COVID-19 Open Research Dataset

Edwin Zhang, Hui Fang, Jimmy Lin, Kuang Lu, Kyunghyun Cho, Nikhil Gupta, Raphael Tang, Rodrigo Nogueira, Ronak Pradeep, Xiao Han, Yue Zhang

arxiv:2007.07846 v1 · 2020-07-14 · cs.IR · 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{DDBVEMHLORTT6BOJCM6ECHBHE5}

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	2026-07-05T01:19:32.643098Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

18c35230eb74673f05c9133c411c272751d8e3c3a58d909fbc595aef3465fbe9

Aliases

arxiv: 2007.07846 · arxiv_version: 2007.07846v1 · doi: 10.48550/arxiv.2007.07846 · pith_short_12: DDBVEMHLORTT · pith_short_16: DDBVEMHLORTT6BOJ · pith_short_8: DDBVEMHL

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/DDBVEMHLORTT6BOJCM6ECHBHE5 \
  | 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: 18c35230eb74673f05c9133c411c272751d8e3c3a58d909fbc595aef3465fbe9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b608fe64aee41b9d3a056221fa5a4898aa59b19155631ad1e478e4ffabc84ca8",
    "cross_cats_sorted": [
      "cs.CL"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2020-07-14T16:26:01Z",
    "title_canon_sha256": "5c46ac920c356c45ab8a23a42bd1a2606c003fb3c3c040672745b91e4e16f047"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2007.07846",
    "kind": "arxiv",
    "version": 1
  }
}