Pith Number

pith:DIXZ6VRG

pith:2026:DIXZ6VRGWM35BG7CQVEQSXUR5P

not attested not anchored not stored refs pending

The Regularization Parameter: Sparse Precision Matrix Estimation

Aryan Eftekhari, Daniel Sergio Vega, Ernst-Jan Camiel Wit, Olaf Schenk

arxiv:2607.07735 v1 · 2026-07-07 · stat.ML · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DIXZ6VRGWM35BG7CQVEQSXUR5P}

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	2026-07-10T00:18:47.508659Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1a2f9f5626b337d09be28549095e91ebc235cdf44b051e6c33fbfdcc93f8a308

Aliases

arxiv: 2607.07735 · arxiv_version: 2607.07735v1 · doi: 10.48550/arxiv.2607.07735 · pith_short_12: DIXZ6VRGWM35 · pith_short_16: DIXZ6VRGWM35BG7C · pith_short_8: DIXZ6VRG

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/DIXZ6VRGWM35BG7CQVEQSXUR5P \
  | 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: 1a2f9f5626b337d09be28549095e91ebc235cdf44b051e6c33fbfdcc93f8a308

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5b9ac6675f32cee74e24c075990f69a54b4557e52e618f4d9a89dbfcb1b665ca",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2026-07-07T13:19:19Z",
    "title_canon_sha256": "28dae158b2ee080b11fc8bc6c87fd6451928ebf9b18d64590a85aa06a0f0844d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.07735",
    "kind": "arxiv",
    "version": 1
  }
}