Pith Number

pith:2WIF5K6Y

pith:2014:2WIF5K6YFXPMU3F4ISN5A674YI

not attested not anchored not stored refs pending

Learning $\ell_1$-based analysis and synthesis sparsity priors using bi-level optimization

Horst Bischof, Thomas Pock, Yunjin Chen

arxiv:1401.4105 v1 · 2014-01-16 · cs.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2WIF5K6YFXPMU3F4ISN5A674YI}

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	2026-05-18T03:01:57.191966Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d5905eabd82ddeca6cbc449bd07bfcc21dd54f60364ba9c31e6ad7bd97d8254f

Aliases

arxiv: 1401.4105 · arxiv_version: 1401.4105v1 · doi: 10.48550/arxiv.1401.4105 · pith_short_12: 2WIF5K6YFXPM · pith_short_16: 2WIF5K6YFXPMU3F4 · pith_short_8: 2WIF5K6Y

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/2WIF5K6YFXPMU3F4ISN5A674YI \
  | 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: d5905eabd82ddeca6cbc449bd07bfcc21dd54f60364ba9c31e6ad7bd97d8254f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d36c23a5535f065bd5d2c8d5a71ff0f49920bdd45592541a50eb75c4dac60fb7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2014-01-16T17:49:45Z",
    "title_canon_sha256": "ab56d4e715d221e1cc855fb0b00073cbde4bb53d03c7aeeffc2c772a79a5e1d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.4105",
    "kind": "arxiv",
    "version": 1
  }
}