Pith Number

pith:VQVGQ6YV

pith:2016:VQVGQ6YV4SBRKI2PP2KZACJDMD

not attested not anchored not stored refs pending

Group sparse optimization via $\ell_{p,q}$ regularization

Chong Li, Jing Qin, Kaiwen Meng, Xiaoqi Yang, Yaohua Hu

arxiv:1601.07779 v1 · 2016-01-28 · 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{VQVGQ6YV4SBRKI2PP2KZACJDMD}

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	2026-05-18T01:21:42.234047Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac2a687b15e48315234f7e9590092360cb45fada7db93ec3a79afcce5f6a4443

Aliases

arxiv: 1601.07779 · arxiv_version: 1601.07779v1 · doi: 10.48550/arxiv.1601.07779 · pith_short_12: VQVGQ6YV4SBR · pith_short_16: VQVGQ6YV4SBRKI2P · pith_short_8: VQVGQ6YV

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/VQVGQ6YV4SBRKI2PP2KZACJDMD \
  | 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: ac2a687b15e48315234f7e9590092360cb45fada7db93ec3a79afcce5f6a4443

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5ab4cbfc9b3b9aac10fa4fce1b6851655610128f3d262d5401970a2d4d14175c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2016-01-28T14:51:12Z",
    "title_canon_sha256": "4e7ce8829d46d2227f6888e28a30fae1ce5cd4949161aeebba007fb7ada3b369"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.07779",
    "kind": "arxiv",
    "version": 1
  }
}