Pith Number

pith:NT7AP36F

pith:2022:NT7AP36FIDRABTHZKZ7RARRP3X

not attested not anchored not stored refs pending

The $hp$-FEM applied to the Helmholtz equation with PML truncation does not suffer from the pollution effect

David Lafontaine, Euan A. Spence, Jared Wunsch, Jeffrey Galkowski

arxiv:2207.05542 v5 · 2022-07-12 · math.AP · cs.NA · 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{NT7AP36FIDRABTHZKZ7RARRP3X}

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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.

Cited by

2 papers in Pith

Multi parameter identification in the nonlinear periodic Westervelt equation

Receipt and verification

First computed	2026-07-05T07:34:45.434071Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6cfe07efc540e200ccf9567f10462fddec5037006043eb7b26e8673c5c34dad2

Aliases

arxiv: 2207.05542 · arxiv_version: 2207.05542v5 · doi: 10.48550/arxiv.2207.05542 · pith_short_12: NT7AP36FIDRA · pith_short_16: NT7AP36FIDRABTHZ · pith_short_8: NT7AP36F

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/NT7AP36FIDRABTHZKZ7RARRP3X \
  | 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: 6cfe07efc540e200ccf9567f10462fddec5037006043eb7b26e8673c5c34dad2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2d445d55e886d9e7b5191e177805da5266ab433454721b18e84c2cc52f24911f",
    "cross_cats_sorted": [
      "cs.NA",
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2022-07-12T14:06:25Z",
    "title_canon_sha256": "d2c03e3a2c26c26f7fa476feadcfba3cbed0d8602d4bc61326ac52c901397312"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2207.05542",
    "kind": "arxiv",
    "version": 5
  }
}