Pith Number

pith:QDDHHLN2

pith:2020:QDDHHLN25BZCYYW7NTO2ATTZQK

not attested not anchored not stored refs pending

Overcoming information reduced data and experimentally uncertain parameters in ptychography with regularized optimization

Christoph T. Koch, David A.Muller, Marcel Schloz, Thomas C. Pekin, Wouter Van den Broek, Zhen Chen

arxiv:2005.01530 v2 · 2020-05-04 · eess.SP · eess.IV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QDDHHLN25BZCYYW7NTO2ATTZQK}

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	2026-07-05T06:31:54.379364Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

80c673adbae8722c62df6cdda04e79829a84c0bc7b853ab0404e178ab4157256

Aliases

arxiv: 2005.01530 · arxiv_version: 2005.01530v2 · doi: 10.48550/arxiv.2005.01530 · pith_short_12: QDDHHLN25BZC · pith_short_16: QDDHHLN25BZCYYW7 · pith_short_8: QDDHHLN2

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/QDDHHLN25BZCYYW7NTO2ATTZQK \
  | 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: 80c673adbae8722c62df6cdda04e79829a84c0bc7b853ab0404e178ab4157256

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4fa8fdbe9e002bd8bee29b6b17896e17bac6c882f6c72983a3b723c2031d9be9",
    "cross_cats_sorted": [
      "eess.IV"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "eess.SP",
    "submitted_at": "2020-05-04T14:42:59Z",
    "title_canon_sha256": "e7e5478ec1fe80ed8036dddbfe066f01dbd485f4270862256c98733b485b6e26"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2005.01530",
    "kind": "arxiv",
    "version": 2
  }
}