Pith Number

pith:7B54I4EK

pith:2026:7B54I4EKY5TFPHLO5ZLPNZGWTB

not attested not anchored not stored refs pending

A matrix-based spectral method for the numerical approximation of the fractional Laplacian and the fractional $p$-Laplacian of functions defined on $\mathbb R^n$

Carlota M. Cuesta, Francisco de la Hoz, Lo\"ic Constantin

arxiv:2605.23252 v1 · 2026-05-22 · 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{7B54I4EKY5TFPHLO5ZLPNZGWTB}

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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	2026-05-25T02:01:45.705156Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f87bc4708ac766579d6eee56f6e4d69848aebd3d38bc9ba826fd17f2d63d7326

Aliases

arxiv: 2605.23252 · arxiv_version: 2605.23252v1 · doi: 10.48550/arxiv.2605.23252 · pith_short_12: 7B54I4EKY5TF · pith_short_16: 7B54I4EKY5TFPHLO · pith_short_8: 7B54I4EK

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/7B54I4EKY5TFPHLO5ZLPNZGWTB \
  | 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: f87bc4708ac766579d6eee56f6e4d69848aebd3d38bc9ba826fd17f2d63d7326

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3e12b6dae882098bd62f2deea74f071f7e0119dae874167658fb439df7818954",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2026-05-22T05:54:44Z",
    "title_canon_sha256": "534fede23df88caf4f2058d3c2e033d37ecbc5571cc8f6739e6f955c9120d5a8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.23252",
    "kind": "arxiv",
    "version": 1
  }
}