Pith Number

pith:Z645LA3K

pith:2015:Z645LA3KCWC2PGJW3GN7TN5DQO

not attested not anchored not stored refs pending

An Iteratively Reweighted Least Squares Algorithm for Sparse Regularization

Ingrid Daubechies, Sergey Voronin

arxiv:1511.08970 v3 · 2015-11-29 · 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{Z645LA3KCWC2PGJW3GN7TN5DQO}

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	2026-05-18T00:53:51.153908Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cfb9d5836a1585a79936d99bf9b7a383bb848db5ad5ac1357280b4626251e93f

Aliases

arxiv: 1511.08970 · arxiv_version: 1511.08970v3 · doi: 10.48550/arxiv.1511.08970 · pith_short_12: Z645LA3KCWC2 · pith_short_16: Z645LA3KCWC2PGJW · pith_short_8: Z645LA3K

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/Z645LA3KCWC2PGJW3GN7TN5DQO \
  | 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: cfb9d5836a1585a79936d99bf9b7a383bb848db5ad5ac1357280b4626251e93f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3dc9fc1a10e8a0cafd98cc5fe72d37f225e6d09f86af2fc51c689577f25e9861",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2015-11-29T05:45:06Z",
    "title_canon_sha256": "4e2ab1fae4bc9ab411048a001c3794dab21713182c9e720dc83ee1a6ce5f3130"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1511.08970",
    "kind": "arxiv",
    "version": 3
  }
}