Pith Number

pith:M2T22BMD

pith:2015:M2T22BMDBFXOE3NMMCFHRZUDH3

not attested not anchored not stored refs pending

Existence of $\mathcal{H}$-matrix approximants to the inverse of BEM matrices: the hyper-singular integral operator

Dirk Praetorius, Jens Markus Melenk, Markus Faustmann

arxiv:1503.01943 v1 · 2015-03-06 · 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{M2T22BMDBFXOE3NMMCFHRZUDH3}

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	2026-05-18T00:29:11.141079Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

66a7ad0583096ee26dac608a78e6833ed6885c3bb2d42ab9a90f4d95f5b848e5

Aliases

arxiv: 1503.01943 · arxiv_version: 1503.01943v1 · doi: 10.48550/arxiv.1503.01943 · pith_short_12: M2T22BMDBFXO · pith_short_16: M2T22BMDBFXOE3NM · pith_short_8: M2T22BMD

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/M2T22BMDBFXOE3NMMCFHRZUDH3 \
  | 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: 66a7ad0583096ee26dac608a78e6833ed6885c3bb2d42ab9a90f4d95f5b848e5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a57c7758b506979bddded584553267d24aa892fc5b9d592f708752b67b19aa55",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2015-03-06T13:18:55Z",
    "title_canon_sha256": "b002fab529ee03c6acc2210058703df65a200bb5bcdbfd0a29119980452557d9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.01943",
    "kind": "arxiv",
    "version": 1
  }
}