Pith Number

pith:5BCQLUCI

pith:2022:5BCQLUCIPFHP7NPOQUM64DPD27

not attested not anchored not stored refs pending

A stochastic gradient descent approach with partitioned-truncated singular value decomposition for large-scale inverse problems of magnetic modulus data

Kangzhi Wang, Tingting Fan, Wenbin Li

arxiv:2201.03964 v1 · 2022-01-11 · math.NA · cs.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{5BCQLUCIPFHP7NPOQUM64DPD27}

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	2026-07-05T04:27:51.036370Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e84505d048794effb5ee8519ee0de3d7d7aa07f23ca24bee5a7ab0f625855a4a

Aliases

arxiv: 2201.03964 · arxiv_version: 2201.03964v1 · doi: 10.48550/arxiv.2201.03964 · pith_short_12: 5BCQLUCIPFHP · pith_short_16: 5BCQLUCIPFHP7NPO · pith_short_8: 5BCQLUCI

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/5BCQLUCIPFHP7NPOQUM64DPD27 \
  | 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: e84505d048794effb5ee8519ee0de3d7d7aa07f23ca24bee5a7ab0f625855a4a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "630cb203e1dc6ed8886f8e368cf973befa831febc97203e5a61ab6b1944875f4",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2022-01-11T14:23:28Z",
    "title_canon_sha256": "045d573e60d43c4fae597f4fc9633a3ddd1213c932af59d3c0261010309e9704"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2201.03964",
    "kind": "arxiv",
    "version": 1
  }
}