Pith Number

pith:B4SJESBT

pith:2018:B4SJESBTZE3ET35IMBTGRWWLAU

not attested not anchored not stored refs pending

Laplacian preconditioning of elliptic PDEs: Localization of the eigenvalues of the discretized operator

Bj{\o}rn Fredrik Nielsen, Kent-Andr\'e Mardal, Tom\'a\v{s} Gergelits, Zden\v{e}k Strako\v{s}

arxiv:1809.03790 v1 · 2018-09-11 · 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{B4SJESBTZE3ET35IMBTGRWWLAU}

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	2026-05-18T00:05:59.823679Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0f24924833c93649efa8606668dacb053823b1123685e72d36cc775649f93751

Aliases

arxiv: 1809.03790 · arxiv_version: 1809.03790v1 · doi: 10.48550/arxiv.1809.03790 · pith_short_12: B4SJESBTZE3E · pith_short_16: B4SJESBTZE3ET35I · pith_short_8: B4SJESBT

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/B4SJESBTZE3ET35IMBTGRWWLAU \
  | 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: 0f24924833c93649efa8606668dacb053823b1123685e72d36cc775649f93751

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "09024093e0403187bb888edc3cab0a2f0b37c79c82a6c489700959940cef2437",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-09-11T10:59:28Z",
    "title_canon_sha256": "0d27a0e19e84039271ce6b2e80558e3f8765c7fcb14e5fdd4a64415dde586678"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.03790",
    "kind": "arxiv",
    "version": 1
  }
}