Pith Number

pith:XASP4S4R

pith:2015:XASP4S4R52NATRHBT6MSW7NVPR

not attested not anchored not stored refs pending

A Nonconvex Approach for Structured Sparse Learning

Hui Qian, Shubao Zhang, Zhihua Zhang

arxiv:1503.02164 v1 · 2015-03-07 · cs.IT · cs.LG · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XASP4S4R52NATRHBT6MSW7NVPR}

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	2026-05-18T02:25:25.714410Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b824fe4b91ee9a09c4e19f992b7db57c67f2d1fe399ab8f6deed6fbf5b582ef6

Aliases

arxiv: 1503.02164 · arxiv_version: 1503.02164v1 · doi: 10.48550/arxiv.1503.02164 · pith_short_12: XASP4S4R52NA · pith_short_16: XASP4S4R52NATRHB · pith_short_8: XASP4S4R

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/XASP4S4R52NATRHBT6MSW7NVPR \
  | 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: b824fe4b91ee9a09c4e19f992b7db57c67f2d1fe399ab8f6deed6fbf5b582ef6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ea35b8a17df5f1f27fe482f15cdc4356ca4bd06dfc8f83e41a5799f311509b55",
    "cross_cats_sorted": [
      "cs.LG",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2015-03-07T12:06:48Z",
    "title_canon_sha256": "72103c56ddf22e436df8e20cf5fa6dad89726d5d44583988d2d798af25180567"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.02164",
    "kind": "arxiv",
    "version": 1
  }
}