Pith Number

pith:QKOYPZ3T

pith:2022:QKOYPZ3TFMVDFYYZ7P2RFSDZU3

not attested not anchored not stored refs pending

Effect of Choices of Boundary Conditions on the Numerical Efficiency of Direct Solutions of Finite Difference frequency Domain Systems with Perfectly Matched Layers

Nathan Zhao, Shanhui Fan

arxiv:2202.13552 v1 · 2022-02-28 · 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{QKOYPZ3TFMVDFYYZ7P2RFSDZU3}

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	2026-07-05T04:43:40.238032Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

829d87e7732b2a32e319fbf512c879a6caef7c181e1a138021415114b1c165f6

Aliases

arxiv: 2202.13552 · arxiv_version: 2202.13552v1 · doi: 10.48550/arxiv.2202.13552 · pith_short_12: QKOYPZ3TFMVD · pith_short_16: QKOYPZ3TFMVDFYYZ · pith_short_8: QKOYPZ3T

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/QKOYPZ3TFMVDFYYZ7P2RFSDZU3 \
  | 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: 829d87e7732b2a32e319fbf512c879a6caef7c181e1a138021415114b1c165f6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ee2d0742609b04bcbcbf50d5f8a0a63b35a89a1029a5b90388df396b3ee5fa57",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2022-02-28T05:39:20Z",
    "title_canon_sha256": "84cce017802ee5eb2ea5674759d25979303a0c885b68dacfb4ed5d8bf9d9a786"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2202.13552",
    "kind": "arxiv",
    "version": 1
  }
}