Pith Number

pith:RPPRG6ZS

pith:2021:RPPRG6ZSMVDREBBYSK34ZY7HPU

not attested not anchored not stored refs pending

Smoothing fast iterative hard thresholding algorithm for $\ell_0$ regularized nonsmooth convex regression problem

Fan Wu, Wei Bian, Xiaoping Xue

arxiv:2104.13107 v1 · 2021-04-27 · 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{RPPRG6ZSMVDREBBYSK34ZY7HPU}

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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.

Cited by

1 paper in Pith

Subspace Newton's Method for $\ell_0$-Regularized Optimization Problems with Box Constraint

Receipt and verification

First computed	2026-07-05T02:35:45.580432Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8bdf137b32654712043892b7cce3e77d3d4a00fadd5ef7444defa983c0bae452

Aliases

arxiv: 2104.13107 · arxiv_version: 2104.13107v1 · doi: 10.48550/arxiv.2104.13107 · pith_short_12: RPPRG6ZSMVDR · pith_short_16: RPPRG6ZSMVDREBBY · pith_short_8: RPPRG6ZS

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/RPPRG6ZSMVDREBBYSK34ZY7HPU \
  | 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: 8bdf137b32654712043892b7cce3e77d3d4a00fadd5ef7444defa983c0bae452

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c854e4e384048040e8c2ad03f16267ad2fbba0680e2bedc8f8da54927a844808",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2021-04-27T11:03:15Z",
    "title_canon_sha256": "c581876f5bbca2206d7360fa84e016174b4cd9e78373a9cccb099c4e95bf6c7f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.13107",
    "kind": "arxiv",
    "version": 1
  }
}