Pith Number

pith:HIS3BQI7

pith:2018:HIS3BQI7RNJJXUUZZQPVMSGFET

not attested not anchored not stored refs pending

Sweeping preconditioners for the iterative solution of quasiperiodic Helmholtz transmission problems in layered media

Carlos P\'erez-Arancibia, Catalin Turc, David Nicholls

arxiv:1809.05634 v1 · 2018-09-15 · math.NA · physics.comp-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HIS3BQI7RNJJXUUZZQPVMSGFET}

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	2026-05-18T00:05:40.406505Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3a25b0c11f8b529bd299cc1f5648c524c2d8930790631ed721339d3f98a5458f

Aliases

arxiv: 1809.05634 · arxiv_version: 1809.05634v1 · doi: 10.48550/arxiv.1809.05634 · pith_short_12: HIS3BQI7RNJJ · pith_short_16: HIS3BQI7RNJJXUUZ · pith_short_8: HIS3BQI7

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/HIS3BQI7RNJJXUUZZQPVMSGFET \
  | 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: 3a25b0c11f8b529bd299cc1f5648c524c2d8930790631ed721339d3f98a5458f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "655888b9d30d805ade6c3d4379fb300c67832961211bca8215193eb871aba287",
    "cross_cats_sorted": [
      "physics.comp-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-09-15T02:27:37Z",
    "title_canon_sha256": "3e5ad5d476fb2953e9ec74867fd64f734be91abaaec31d88f3575aad221ded22"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.05634",
    "kind": "arxiv",
    "version": 1
  }
}