Pith Number

pith:X4MFBL5K

pith:2025:X4MFBL5KD4VD4HRPUCNJZZUEBL

not attested not anchored not stored refs pending

Exploring Topic Trends in COVID-19 Research Literature using Non-Negative Matrix Factorization

Agam Shah, Bhaskar Chaudhury, Divya Patel, Om Patel, Vansh Parikh

arxiv:2503.18182 v1 · 2025-03-23 · 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{X4MFBL5KD4VD4HRPUCNJZZUEBL}

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	2026-07-05T10:38:04.577633Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bf1850afaa1f2a3e1e2fa09a9ce6840ac4a0deb24a1128e41d85f56a8e712a6a

Aliases

arxiv: 2503.18182 · arxiv_version: 2503.18182v1 · doi: 10.48550/arxiv.2503.18182 · pith_short_12: X4MFBL5KD4VD · pith_short_16: X4MFBL5KD4VD4HRP · pith_short_8: X4MFBL5K

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/X4MFBL5KD4VD4HRPUCNJZZUEBL \
  | 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: bf1850afaa1f2a3e1e2fa09a9ce6840ac4a0deb24a1128e41d85f56a8e712a6a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3600910d1c678b58938d03a2bd4d3e6b48e6c605beec7a5270ee1c5b4564b6aa",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2025-03-23T19:37:52Z",
    "title_canon_sha256": "9ad70f17720169fc1bcd89fd6a2192529cc94b9bddddf2ac563999f56b10bab3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2503.18182",
    "kind": "arxiv",
    "version": 1
  }
}