Pith Number

pith:XH4QZQJ2

pith:2009:XH4QZQJ2UEFXSJGLJTIB4HLU6K

not attested not anchored not stored refs pending

Multiplicative Noise Removal Using Variable Splitting and Constrained Optimization

Jos\'e M. Bioucas-Dias, M\'ario A. T. Figueiredo

arxiv:0912.1845 v2 · 2009-12-09 · math.OC · 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{XH4QZQJ2UEFXSJGLJTIB4HLU6K}

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	2026-05-18T02:10:25.122124Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b9f90cc13aa10b7924cb4cd01e1d74f28eb50ce4a534100af75a6c655c91d2aa

Aliases

arxiv: 0912.1845 · arxiv_version: 0912.1845v2 · doi: 10.48550/arxiv.0912.1845 · pith_short_12: XH4QZQJ2UEFX · pith_short_16: XH4QZQJ2UEFXSJGL · pith_short_8: XH4QZQJ2

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/XH4QZQJ2UEFXSJGLJTIB4HLU6K \
  | 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: b9f90cc13aa10b7924cb4cd01e1d74f28eb50ce4a534100af75a6c655c91d2aa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2011cd7118e66d09dc24e8a8cbee875c123908b2de28de841e83ddc242717ff7",
    "cross_cats_sorted": [
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2009-12-09T20:17:36Z",
    "title_canon_sha256": "fcde97c8335045a85959955797761bd4f151b32fdc1a7c15623f18930b5080e8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.1845",
    "kind": "arxiv",
    "version": 2
  }
}