Pith Number

pith:XWQ4XOOP

pith:2014:XWQ4XOOPKV5UXMQMKMGDJCEUYI

not attested not anchored not stored refs pending

Proximal Heterogeneous Block Input-Output Method and application to Blind Ptychographic Diffraction Imaging

D. Russell Luke, Matthew K. Tam, Robert Hesse, Shoham Sabach

arxiv:1408.1887 v1 · 2014-08-08 · 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{XWQ4XOOPKV5UXMQMKMGDJCEUYI}

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	2026-05-18T00:24:25.481089Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bda1cbb9cf557b4bb20c530c348894c23aec07b30d6f0e3206895379fd66392a

Aliases

arxiv: 1408.1887 · arxiv_version: 1408.1887v1 · doi: 10.48550/arxiv.1408.1887 · pith_short_12: XWQ4XOOPKV5U · pith_short_16: XWQ4XOOPKV5UXMQM · pith_short_8: XWQ4XOOP

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/XWQ4XOOPKV5UXMQMKMGDJCEUYI \
  | 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: bda1cbb9cf557b4bb20c530c348894c23aec07b30d6f0e3206895379fd66392a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "072736a42276294049fa13780e4b89e8597f7d48141b1e682fae959a17478150",
    "cross_cats_sorted": [
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2014-08-08T15:25:48Z",
    "title_canon_sha256": "00ad908a624d51f6455182beea71665aaa5eec1688aa0400b814fd91902a8928"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1408.1887",
    "kind": "arxiv",
    "version": 1
  }
}