Pith Number

pith:6GBIBLHO

pith:2026:6GBIBLHOQ6VXRS4OSJFNJ2PU55

not attested not anchored not stored refs pending

Robust Hierarchical Matrix Compression of Acoustic Volume and Boundary Integral Operators

Alberto Almuna-Morales, Danilo Aballay, Elwin van 't Wout, Ignacio Labarca-Figueroa

arxiv:2607.19500 v1 · 2026-07-21 · math.NA · cs.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{6GBIBLHOQ6VXRS4OSJFNJ2PU55}

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	2026-07-23T00:23:53.394367Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f18280acee87ab78cb8e924ad4e9f4ef5941f788ba875c817ce0f50dfdf80701

Aliases

arxiv: 2607.19500 · arxiv_version: 2607.19500v1 · doi: 10.48550/arxiv.2607.19500 · pith_short_12: 6GBIBLHOQ6VX · pith_short_16: 6GBIBLHOQ6VXRS4O · pith_short_8: 6GBIBLHO

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/6GBIBLHOQ6VXRS4OSJFNJ2PU55 \
  | 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: f18280acee87ab78cb8e924ad4e9f4ef5941f788ba875c817ce0f50dfdf80701

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dd84459aa55933c99a382a3002c9a2b8734c430763fcfb790292b26357bcb06f",
    "cross_cats_sorted": [
      "cs.NA",
      "physics.comp-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2026-07-21T18:25:10Z",
    "title_canon_sha256": "70e05a4461d79432185744cee22276d285d59d848270e8451585cf164cbc9d2b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.19500",
    "kind": "arxiv",
    "version": 1
  }
}