Pith Number

pith:CUHBJIRK

pith:2019:CUHBJIRKHZAGN6GRC3DGVIWKLH

not attested not anchored not stored refs pending

A direct solver for the phase retrieval problem in ptychographic imaging

Christian Schroer, Florian Bo{\ss}mann, Frank Filbir, Maik Kahnt, Mark Iwen, Nada Sissouno, Rayan Saab, Wolfgang zu Castell

arxiv:1904.07940 v1 · 2019-04-16 · 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{CUHBJIRKHZAGN6GRC3DGVIWKLH}

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	2026-05-17T23:48:19.342851Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

150e14a22a3e4066f8d116c66aa2ca59f1fb76e2e63835dd66d2126fa528fa0a

Aliases

arxiv: 1904.07940 · arxiv_version: 1904.07940v1 · doi: 10.48550/arxiv.1904.07940 · pith_short_12: CUHBJIRKHZAG · pith_short_16: CUHBJIRKHZAGN6GR · pith_short_8: CUHBJIRK

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/CUHBJIRKHZAGN6GRC3DGVIWKLH \
  | 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: 150e14a22a3e4066f8d116c66aa2ca59f1fb76e2e63835dd66d2126fa528fa0a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0cd77b96fdfe1af1ecf0bd97b08e85eef1baae3b73ec918e7d7b3abe2fe123c2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-04-16T19:25:41Z",
    "title_canon_sha256": "f3da01fa26565dee14a7abe1a43bfa383fa4e4dbdd384a7513d50e8431c14598"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.07940",
    "kind": "arxiv",
    "version": 1
  }
}