Pith Number

pith:4H5K4PO6

pith:2026:4H5K4PO6WRH42M3EURVWFUX6DJ

not attested not anchored not stored refs pending

Exact-curved Lagrange finite elements for the Poisson problem in two dimensions

Hiroki Ishizaka

arxiv:2605.26566 v1 · 2026-05-26 · 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{4H5K4PO6WRH42M3EURVWFUX6DJ}

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	2026-05-27T01:05:26.519157Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e1faae3ddeb44fcd3364a46b62d2fe1a598fb9e62360b7df1bdb526a63984ebf

Aliases

arxiv: 2605.26566 · arxiv_version: 2605.26566v1 · doi: 10.48550/arxiv.2605.26566 · pith_short_12: 4H5K4PO6WRH4 · pith_short_16: 4H5K4PO6WRH42M3E · pith_short_8: 4H5K4PO6

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/4H5K4PO6WRH42M3EURVWFUX6DJ \
  | 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: e1faae3ddeb44fcd3364a46b62d2fe1a598fb9e62360b7df1bdb526a63984ebf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "086ed61893d59d5391a689896d3ce686286eea2ee3e3dc87aa5f763c4a3691f8",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2026-05-26T05:33:38Z",
    "title_canon_sha256": "c1bea5516e8e085e262b1fd4f53ea7b6d8b7b8d09bc9db7d584b23434c4b3031"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.26566",
    "kind": "arxiv",
    "version": 1
  }
}