Pith Number

pith:2U3BP3KE

pith:2014:2U3BP3KE6MMBODBWQTXS3VUEL2

not attested not anchored not stored refs pending

The Ordered Weighted $\ell_1$ Norm: Atomic Formulation, Projections, and Algorithms

M\'ario A. T. Figueiredo, Xiangrong Zeng

arxiv:1409.4271 v5 · 2014-09-15 · cs.DS · cs.CV · 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{2U3BP3KE6MMBODBWQTXS3VUEL2}

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	2026-05-18T02:19:08.292614Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d53617ed44f318170c3684ef2dd6845ea5d7df17f7e8db2bd7bde5d10d8c2efa

Aliases

arxiv: 1409.4271 · arxiv_version: 1409.4271v5 · doi: 10.48550/arxiv.1409.4271 · pith_short_12: 2U3BP3KE6MMB · pith_short_16: 2U3BP3KE6MMBODBW · pith_short_8: 2U3BP3KE

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/2U3BP3KE6MMBODBWQTXS3VUEL2 \
  | 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: d53617ed44f318170c3684ef2dd6845ea5d7df17f7e8db2bd7bde5d10d8c2efa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dece0369dc858cb3c6cd096096cb2f35f218b1e7d110ec6be43d1d69cbb8d79e",
    "cross_cats_sorted": [
      "cs.CV",
      "cs.IT",
      "cs.LG",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2014-09-15T14:22:34Z",
    "title_canon_sha256": "66a5062075fbd60e09e120bbb65f3bb6df2f71250f4b128d2abef10983937848"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1409.4271",
    "kind": "arxiv",
    "version": 5
  }
}