Pith Number

pith:IWHNJ7IS

pith:2022:IWHNJ7ISTN7B5SPT6QRQSHMTCP

not attested not anchored not stored refs pending

Preconditioned Least-Squares Petrov-Galerkin Reduced Order Models

Irina Tezaur, Jeffrey Fike, Kevin Carlberg, Payton Lindsay

arxiv:2203.12180 v1 · 2022-03-23 · math.NA · cs.MS · 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{IWHNJ7ISTN7B5SPT6QRQSHMTCP}

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	2026-07-05T04:07:56.690782Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

458ed4fd129b7e1ec9f3f423091d9313d997441414418fe5478e1c637e70d844

Aliases

arxiv: 2203.12180 · arxiv_version: 2203.12180v1 · doi: 10.48550/arxiv.2203.12180 · pith_short_12: IWHNJ7ISTN7B · pith_short_16: IWHNJ7ISTN7B5SPT · pith_short_8: IWHNJ7IS

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/IWHNJ7ISTN7B5SPT6QRQSHMTCP \
  | 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: 458ed4fd129b7e1ec9f3f423091d9313d997441414418fe5478e1c637e70d844

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4b0570ececc358c603314f44769f72ab8b4bddd29bbeae278fc138335f0621e6",
    "cross_cats_sorted": [
      "cs.MS",
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2022-03-23T03:48:01Z",
    "title_canon_sha256": "e5c6006b722ac3838597d0691cf8f0e4c0d01b3720f6c467ad8866a2a5bb8b29"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2203.12180",
    "kind": "arxiv",
    "version": 1
  }
}