Pith Number

pith:OK4OYUVV

pith:2020:OK4OYUVVZWEWBOLOY6TADCMIFW

not attested not anchored not stored refs pending

COVID-19 Time-series Prediction by Joint Dictionary Learning and Online NMF

Christopher Strohmeier, Deanna Needell, Georg Menz, Hanbaek Lyu

arxiv:2004.09112 v1 · 2020-04-20 · cs.LG · math.OC · 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{OK4OYUVVZWEWBOLOY6TADCMIFW}

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	2026-07-05T00:56:13.155825Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

72b8ec52b5cd8960b96ec7a60189882da2c00aa2031799bfab846b38e983b1c1

Aliases

arxiv: 2004.09112 · arxiv_version: 2004.09112v1 · doi: 10.48550/arxiv.2004.09112 · pith_short_12: OK4OYUVVZWEW · pith_short_16: OK4OYUVVZWEWBOLO · pith_short_8: OK4OYUVV

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/OK4OYUVVZWEWBOLOY6TADCMIFW \
  | 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: 72b8ec52b5cd8960b96ec7a60189882da2c00aa2031799bfab846b38e983b1c1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9535843fe95c5ed5340a5b8457e76d19889aead372064680f3d03e68a2d3c7d3",
    "cross_cats_sorted": [
      "math.OC",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2020-04-20T08:02:03Z",
    "title_canon_sha256": "38fcd40aba45b493ee2b7e027bdbd0d0c0127818dd1ec0d2b448d275194e5cec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2004.09112",
    "kind": "arxiv",
    "version": 1
  }
}