Pith Number

pith:RHXTAIIC

pith:2018:RHXTAIICLQRVAAKTNNSQ6QJNEV

not attested not anchored not stored refs pending

Tikhonov regularization with l^0-term complementing a convex penalty: l^1 convergence under sparsity constraints

Bernd Hofmann, Jin Cheng, Shuai Lu, Wei Wang

arxiv:1810.08775 v1 · 2018-10-20 · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RHXTAIICLQRVAAKTNNSQ6QJNEV}

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	2026-05-18T00:02:41.933032Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

89ef3021025c235001536b650f412d256d00c2b8e259c94884610289a70f3678

Aliases

arxiv: 1810.08775 · arxiv_version: 1810.08775v1 · doi: 10.48550/arxiv.1810.08775 · pith_short_12: RHXTAIICLQRV · pith_short_16: RHXTAIICLQRVAAKT · pith_short_8: RHXTAIIC

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/RHXTAIICLQRVAAKTNNSQ6QJNEV \
  | 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: 89ef3021025c235001536b650f412d256d00c2b8e259c94884610289a70f3678

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4e50c1cbb951e94c73045ca92825dc332f6632f4f2d08d5269806ddd257d7638",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-10-20T09:29:47Z",
    "title_canon_sha256": "c443db25e52895287c1615d81b8166d400a38b7fa24d0a915129a278567890d5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.08775",
    "kind": "arxiv",
    "version": 1
  }
}