Pith Number

pith:DX32WJRM

pith:2013:DX32WJRMH4TL4KS5GSRMOZ6A3O

not attested not anchored not stored refs pending

Existence of $\mathcal{H}$-matrix approximants to the inverses of BEM matrices: the simple-layer operator

Dirk Praetorius, Jens Markus Melenk, Markus Faustmann

arxiv:1311.5028 v2 · 2013-11-20 · 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{DX32WJRMH4TL4KS5GSRMOZ6A3O}

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	2026-05-18T01:13:31.266180Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1df7ab262c3f26be2a5d34a2c767c0dbb3cdb60d17c335aba892839acfa381f6

Aliases

arxiv: 1311.5028 · arxiv_version: 1311.5028v2 · doi: 10.48550/arxiv.1311.5028 · pith_short_12: DX32WJRMH4TL · pith_short_16: DX32WJRMH4TL4KS5 · pith_short_8: DX32WJRM

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/DX32WJRMH4TL4KS5GSRMOZ6A3O \
  | 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: 1df7ab262c3f26be2a5d34a2c767c0dbb3cdb60d17c335aba892839acfa381f6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7ec92df1a72d2dfe43746af339fe64f3db3ddee4b85ea4d6253e451f8c233c32",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2013-11-20T12:08:28Z",
    "title_canon_sha256": "2c4abbfe51fafdabb836396988e97b497c5913f3522f77bdc3130738d230e2e7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.5028",
    "kind": "arxiv",
    "version": 2
  }
}