Pith Number

pith:IRHWLNPG

pith:2019:IRHWLNPGNYM6SG74B33A3A2SV3

not attested not anchored not stored refs pending

Out-of-core singular value decomposition

Miroslav Ba\v{c}\'ak, Stefan Bordag, Vadim Demchik

arxiv:1907.06470 v1 · 2019-07-15 · cs.MS · cs.NA · 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{IRHWLNPGNYM6SG74B33A3A2SV3}

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	2026-05-17T23:40:37.593913Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

444f65b5e66e19e91bfc0ef60d8352aee171064f6a3c76998020ffc1308b157b

Aliases

arxiv: 1907.06470 · arxiv_version: 1907.06470v1 · doi: 10.48550/arxiv.1907.06470 · pith_short_12: IRHWLNPGNYM6 · pith_short_16: IRHWLNPGNYM6SG74 · pith_short_8: IRHWLNPG

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/IRHWLNPGNYM6SG74B33A3A2SV3 \
  | 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: 444f65b5e66e19e91bfc0ef60d8352aee171064f6a3c76998020ffc1308b157b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "06c594ec9b31df7c4ebf0e7e939ee160d87be352e9d36982acdc5b55d41860be",
    "cross_cats_sorted": [
      "cs.NA",
      "math.NA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.MS",
    "submitted_at": "2019-07-15T12:41:47Z",
    "title_canon_sha256": "445a1040d19ce936026cc53791f345ca6f2df544f1ca059663766b5c9f127f04"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.06470",
    "kind": "arxiv",
    "version": 1
  }
}