Pith Number

pith:3LJ3ST4M

pith:2026:3LJ3ST4MT72YKCFPHHOOUW5NK4

not attested not anchored not stored refs pending

No 3D Matrices: A Unified Tensor-Product View of Matrix-Free Cartesian PDE Solvers

Kathleen A. Yearick, Yong Yi Bay

arxiv:2606.25148 v1 · 2026-06-23 · math.NA · cs.CE · cs.NA · physics.comp-ph · physics.flu-dyn

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3LJ3ST4MT72YKCFPHHOOUW5NK4}

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	2026-06-25T00:18:19.359185Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dad3b94f8c9ff58508af39dcea5bad5702b07cc2b20a6d96012de8bbbe38c9a5

Aliases

arxiv: 2606.25148 · arxiv_version: 2606.25148v1 · doi: 10.48550/arxiv.2606.25148 · pith_short_12: 3LJ3ST4MT72Y · pith_short_16: 3LJ3ST4MT72YKCFP · pith_short_8: 3LJ3ST4M

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/3LJ3ST4MT72YKCFPHHOOUW5NK4 \
  | 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: dad3b94f8c9ff58508af39dcea5bad5702b07cc2b20a6d96012de8bbbe38c9a5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "073ec2d6aecccbd84f9e3de1285802ea8c1d5ccbe20c6da647d507fa9f731c9e",
    "cross_cats_sorted": [
      "cs.CE",
      "cs.NA",
      "physics.comp-ph",
      "physics.flu-dyn"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2026-06-23T20:30:10Z",
    "title_canon_sha256": "8f703e5b04d56a4d1f5c5952bd7e2cd0fa01d19d5c26d4718998e2f9b3c97962"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.25148",
    "kind": "arxiv",
    "version": 1
  }
}