Pith Number

pith:7QAYWMQN

pith:2014:7QAYWMQNU4YA27O7HBRTJSY7XY

not attested not anchored not stored refs pending

A Highly Efficient Implementation of Multiple Precision Sparse Matrix-Vector Multiplication and Its Application to Product-type Krylov Subspace Methods

Tomonori Kouya

arxiv:1411.2377 v1 · 2014-11-10 · 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{7QAYWMQNU4YA27O7HBRTJSY7XY}

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	2026-05-18T02:38:07.652902Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc018b320da7300d7ddf386334cb1fbe0dbd5d53aabfe9f52ca7f0c2981eb4b2

Aliases

arxiv: 1411.2377 · arxiv_version: 1411.2377v1 · doi: 10.48550/arxiv.1411.2377 · pith_short_12: 7QAYWMQNU4YA · pith_short_16: 7QAYWMQNU4YA27O7 · pith_short_8: 7QAYWMQN

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/7QAYWMQNU4YA27O7HBRTJSY7XY \
  | 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: fc018b320da7300d7ddf386334cb1fbe0dbd5d53aabfe9f52ca7f0c2981eb4b2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1bb43b815de2db230c83157e19d21e7cf29dbf13f22e954059c22f5f97d5deef",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2014-11-10T10:58:18Z",
    "title_canon_sha256": "7b69cdbc1e4c967dbf4ed183d8e8eb84f33e51c13e23b67d277d011934eb7366"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1411.2377",
    "kind": "arxiv",
    "version": 1
  }
}