Pith Number

pith:XVGYJY4S

pith:2015:XVGYJY4S3GBGFM3LIKF5W35Q4D

not attested not anchored not stored refs pending

Reweighted nuclear norm regularization: A SPARSEVA approach

Bo Wahlberg, Cristian R. Rojas, Huong Ha, James S. Welsh, Niclas Blomberg

arxiv:1507.05718 v1 · 2015-07-21 · 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{XVGYJY4S3GBGFM3LIKF5W35Q4D}

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	2026-05-18T01:36:32.672543Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bd4d84e392d98262b36b428bdb6fb0e0c4c085dc5d9b1b9df7394f2d1a5b5192

Aliases

arxiv: 1507.05718 · arxiv_version: 1507.05718v1 · doi: 10.48550/arxiv.1507.05718 · pith_short_12: XVGYJY4S3GBG · pith_short_16: XVGYJY4S3GBGFM3L · pith_short_8: XVGYJY4S

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/XVGYJY4S3GBGFM3LIKF5W35Q4D \
  | 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: bd4d84e392d98262b36b428bdb6fb0e0c4c085dc5d9b1b9df7394f2d1a5b5192

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c7d764f280a1c7e01c0662b453458e36447fe0d8778626fd46b318b439b68589",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2015-07-21T06:27:55Z",
    "title_canon_sha256": "58c4485d5b9d8cfd365a14fb2a42e15dabc7adf3cec4139e5822cd9015a6dfc7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.05718",
    "kind": "arxiv",
    "version": 1
  }
}