Pith Number

pith:K2ED5EYN

pith:2012:K2ED5EYN53PFQB33QJ46KUG75I

not attested not anchored not stored refs pending

Robust Dropping Criteria for F-norm Minimization Based Sparse Approximate Inverse Preconditioning

Qian Zhang, Zhongxiao Jia

arxiv:1203.2325 v4 · 2012-03-11 · 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{K2ED5EYN53PFQB33QJ46KUG75I}

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	2026-05-18T02:23:35.854593Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

56883e930deede58077b8279e550dfea162097246fa0792e076a37e7faa5851a

Aliases

arxiv: 1203.2325 · arxiv_version: 1203.2325v4 · doi: 10.48550/arxiv.1203.2325 · pith_short_12: K2ED5EYN53PF · pith_short_16: K2ED5EYN53PFQB33 · pith_short_8: K2ED5EYN

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/K2ED5EYN53PFQB33QJ46KUG75I \
  | 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: 56883e930deede58077b8279e550dfea162097246fa0792e076a37e7faa5851a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "db1afef73020033960bec34ff45243829e3b9b80460a9b314bdb849376bb2e48",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2012-03-11T12:05:27Z",
    "title_canon_sha256": "aa23758d19b44d34170bc9737099c4d6c3f4f9dd94a8a9dba98638326b1e1045"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.2325",
    "kind": "arxiv",
    "version": 4
  }
}