Pith Number

pith:MHCE74Y7

pith:2017:MHCE74Y7CWCO3U7BVH74LRGZPZ

not attested not anchored not stored refs pending

The regularization theory of the Krylov iterative solvers LSQR and CGLS for linear discrete ill-posed problems, part I: the simple singular value case

Zhongxiao Jia

arxiv:1701.05708 v1 · 2017-01-20 · 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{MHCE74Y7CWCO3U7BVH74LRGZPZ}

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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	2026-05-18T00:52:28.725495Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

61c44ff31f1584edd3e1a9ffc5c4d97e67e4e7a30bcefc2576242f0ff5593b59

Aliases

arxiv: 1701.05708 · arxiv_version: 1701.05708v1 · doi: 10.48550/arxiv.1701.05708 · pith_short_12: MHCE74Y7CWCO · pith_short_16: MHCE74Y7CWCO3U7B · pith_short_8: MHCE74Y7

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/MHCE74Y7CWCO3U7BVH74LRGZPZ \
  | 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: 61c44ff31f1584edd3e1a9ffc5c4d97e67e4e7a30bcefc2576242f0ff5593b59

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3680071cdb26ea378994f49ec4db0285b82c235f75c638583de921706b580062",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2017-01-20T07:29:05Z",
    "title_canon_sha256": "fe46688733fa7845fd237f78b776394acc07c1741ae6f38777e9fae1e82e1c6a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.05708",
    "kind": "arxiv",
    "version": 1
  }
}