Pith Number

pith:AFNFKNRM

pith:2020:AFNFKNRMNDCIMLQ4MDSE5VB6XA

not attested not anchored not stored refs pending

COVID-19 Literature Topic-Based Search via Hierarchical NMF

Alona Kryshchenko, Deanna Needell, Elizaveta Rebrova, Kyung Ha, Longxiu Huang, Oleksandr Kryshchenko, Pengyu Li, Rachel Grotheer, Xia Li, Yihuan Huang

arxiv:2009.09074 v1 · 2020-09-07 · cs.DL · cs.IR · cs.LG · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{AFNFKNRMNDCIMLQ4MDSE5VB6XA}

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	2026-07-05T01:36:33.563212Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

015a55362c68c4862e1c60e44ed43eb810a03e21150c1d98cd64ec84d0881339

Aliases

arxiv: 2009.09074 · arxiv_version: 2009.09074v1 · doi: 10.48550/arxiv.2009.09074 · pith_short_12: AFNFKNRMNDCI · pith_short_16: AFNFKNRMNDCIMLQ4 · pith_short_8: AFNFKNRM

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/AFNFKNRMNDCIMLQ4MDSE5VB6XA \
  | 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: 015a55362c68c4862e1c60e44ed43eb810a03e21150c1d98cd64ec84d0881339

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7188aab6c0057b7833af7c0e20963eaef5913393e4376eb8d98cf28c9594b220",
    "cross_cats_sorted": [
      "cs.IR",
      "cs.LG",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DL",
    "submitted_at": "2020-09-07T05:45:03Z",
    "title_canon_sha256": "6da3883e99ba80cb6d782183bf748e862cf382d685b0b827c7387eed1645bc2d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2009.09074",
    "kind": "arxiv",
    "version": 1
  }
}