Pith Number

pith:24WC2UZW

pith:2013:24WC2UZWKB636UPDTIPDW5AYSF

not attested not anchored not stored refs pending

Optimal rank matrix algebras preconditioners

C. Di Fiore, E. E. Tyrtyshnikov, F. Tudisco

arxiv:1304.0563 v1 · 2013-04-02 · 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{24WC2UZWKB636UPDTIPDW5AYSF}

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	2026-05-18T03:29:15.045685Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d72c2d5336507dbf51e39a1e3b7418916b644ea97b0d6ec4d2effac045666f17

Aliases

arxiv: 1304.0563 · arxiv_version: 1304.0563v1 · doi: 10.48550/arxiv.1304.0563 · pith_short_12: 24WC2UZWKB63 · pith_short_16: 24WC2UZWKB636UPD · pith_short_8: 24WC2UZW

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/24WC2UZWKB636UPDTIPDW5AYSF \
  | 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: d72c2d5336507dbf51e39a1e3b7418916b644ea97b0d6ec4d2effac045666f17

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ae2cfdab10c2a13ff53614edec39ded41ab092b03d602a84a04582af13e47f84",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2013-04-02T08:53:03Z",
    "title_canon_sha256": "c10a0919df87ed308a2edae8255e245a518eadeae9cdef18018c48f1c33e7582"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.0563",
    "kind": "arxiv",
    "version": 1
  }
}