Pith Number

pith:LTOOXWNB

pith:2021:LTOOXWNBA2KP4SJJMDTFQTYOPO

not attested not anchored not stored refs pending

Spurious Quasi-Resonances in Boundary Integral Equations for the Helmholtz Transmission Problem

Andrea Moiola, Euan A. Spence, Ralf Hiptmair

arxiv:2109.08530 v4 · 2021-09-17 · 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{LTOOXWNBA2KP4SJJMDTFQTYOPO}

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	2026-07-05T04:51:38.617853Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5cdcebd9a10694fe492960e6584f0e7b9062aab356a5630af926060afb005683

Aliases

arxiv: 2109.08530 · arxiv_version: 2109.08530v4 · doi: 10.48550/arxiv.2109.08530 · pith_short_12: LTOOXWNBA2KP · pith_short_16: LTOOXWNBA2KP4SJJ · pith_short_8: LTOOXWNB

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/LTOOXWNBA2KP4SJJMDTFQTYOPO \
  | 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: 5cdcebd9a10694fe492960e6584f0e7b9062aab356a5630af926060afb005683

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "51ac72fd9e27e7f737f0135b0f05e5e95ea12f71b8b4c6875e28efd790b8e128",
    "cross_cats_sorted": [
      "cs.NA",
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2021-09-17T13:09:30Z",
    "title_canon_sha256": "3b271702bff815a0d3b6a93fa1f26ddd8050b48202cc63330e677a5d7d8fb199"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.08530",
    "kind": "arxiv",
    "version": 4
  }
}