Pith Number

pith:Z7RQOWRG

pith:2019:Z7RQOWRGEQQ5BBSHEURKOYH3DH

not attested not anchored not stored refs pending

A Stochastic LBFGS Algorithm for Radio Interferometric Calibration

Faruk Diblen, Hanno Spreeuw, Lukas De Clercq, Sarod Yatawatta

arxiv:1904.05619 v2 · 2019-04-11 · astro-ph.IM · cs.LG · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Z7RQOWRGEQQ5BBSHEURKOYH3DH}

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	2026-05-17T23:48:39.126033Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cfe3075a262421d086472522a760fb19f32baa2da788b09565579af87126ff20

Aliases

arxiv: 1904.05619 · arxiv_version: 1904.05619v2 · doi: 10.48550/arxiv.1904.05619 · pith_short_12: Z7RQOWRGEQQ5 · pith_short_16: Z7RQOWRGEQQ5BBSH · pith_short_8: Z7RQOWRG

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/Z7RQOWRGEQQ5BBSHEURKOYH3DH \
  | 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: cfe3075a262421d086472522a760fb19f32baa2da788b09565579af87126ff20

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "06f8810240a01fef2f5675357c1c0c2750c487850da2f986aecb546303c6069c",
    "cross_cats_sorted": [
      "cs.LG",
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2019-04-11T10:50:33Z",
    "title_canon_sha256": "2a2959aeb18be8c412786f46d7287b632b1aadd5c57952803a674c79c1adfb5e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.05619",
    "kind": "arxiv",
    "version": 2
  }
}