Pith Number

pith:WOCLQ7KM

pith:2011:WOCLQ7KMACRFISIBAEFXCETERM

not attested not anchored not stored refs pending

Graph partitioning using matrix values for preconditioning symmetric positive definite systems

Eugene Vecharynski, Masha Sosonkina, Yousef Saad

arxiv:1110.5709 v4 · 2011-10-26 · 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{WOCLQ7KMACRFISIBAEFXCETERM}

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	2026-05-18T03:07:02.338683Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b384b87d4c00a2544901010b7112648b14ad09faed4be271fd040fe870182971

Aliases

arxiv: 1110.5709 · arxiv_version: 1110.5709v4 · doi: 10.48550/arxiv.1110.5709 · pith_short_12: WOCLQ7KMACRF · pith_short_16: WOCLQ7KMACRFISIB · pith_short_8: WOCLQ7KM

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/WOCLQ7KMACRFISIBAEFXCETERM \
  | 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: b384b87d4c00a2544901010b7112648b14ad09faed4be271fd040fe870182971

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "996a7e7a6a65136d64405d34d607a2ef5ff02bc90006c61d04b70beb93f5a4bf",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2011-10-26T06:29:21Z",
    "title_canon_sha256": "67b1606b674349f6529b8ae9f88589b04b05b92586aa0c36c4c75de5adc93ffb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1110.5709",
    "kind": "arxiv",
    "version": 4
  }
}