Pith Number

pith:4TYNNRFE

pith:2019:4TYNNRFEYCQ3QWN5PRZO4LTELW

not attested not anchored not stored refs pending

Spectral Algorithm for Low-rank Multitask Regression

Ami Wiesel, Avinatan Hassidim, Gal Elidan, Sella Nevo, Yossi Matias, Yotam Gigi

arxiv:1910.12204 v1 · 2019-10-27 · 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{4TYNNRFEYCQ3QWN5PRZO4LTELW}

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	2026-07-05T00:15:14.040936Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e4f0d6c4a4c0a1b859bd7c72ee2e645d86650f3378ca64b682ea3998f65f30dc

Aliases

arxiv: 1910.12204 · arxiv_version: 1910.12204v1 · doi: 10.48550/arxiv.1910.12204 · pith_short_12: 4TYNNRFEYCQ3 · pith_short_16: 4TYNNRFEYCQ3QWN5 · pith_short_8: 4TYNNRFE

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/4TYNNRFEYCQ3QWN5PRZO4LTELW \
  | 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: e4f0d6c4a4c0a1b859bd7c72ee2e645d86650f3378ca64b682ea3998f65f30dc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d9f1e1461d9f208087cc3508adf0dfde461d6cc4a43eb7fbd1c6e756d0b648c7",
    "cross_cats_sorted": [
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2019-10-27T08:00:17Z",
    "title_canon_sha256": "d6aa5cbc386749154b296c42ed8f42f26926d1d1e724da10c7f049f6e8a8067d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1910.12204",
    "kind": "arxiv",
    "version": 1
  }
}