Pith Number

pith:USBPRYZC

pith:2009:USBPRYZC3EA35YROIOGLH554SZ

not attested not anchored not stored refs pending

A Pathwise Algorithm for Covariance Selection

Alexandre d'Aspremont, Vijay Krishnamurthy

arxiv:0908.0143 v2 · 2009-08-02 · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{USBPRYZC3EA35YROIOGLH554SZ}

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	2026-05-18T04:39:39.139195Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a482f8e322d901bee22e438cb3f7bc9677a88daa4805433b1c8bb77cc41e4490

Aliases

arxiv: 0908.0143 · arxiv_version: 0908.0143v2 · doi: 10.48550/arxiv.0908.0143 · pith_short_12: USBPRYZC3EA3 · pith_short_16: USBPRYZC3EA35YRO · pith_short_8: USBPRYZC

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/USBPRYZC3EA35YROIOGLH554SZ \
  | 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: a482f8e322d901bee22e438cb3f7bc9677a88daa4805433b1c8bb77cc41e4490

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "502121d52260a8b39fc43c9de82ccd17266e74edcd15e16380296e1d830fbe51",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2009-08-02T17:29:28Z",
    "title_canon_sha256": "ada0b715fb67f08edeaa3e77f780549ae60783864c5a7893d95d1cc01bc8ea6a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.0143",
    "kind": "arxiv",
    "version": 2
  }
}