Pith Number

pith:A4N2EMBS

pith:2018:A4N2EMBSTTSDD5HO4VZ2NH7DVG

not attested not anchored not stored refs pending

Fast QR decomposition of HODLR matrices

Ana Susnjara, Daniel Kressner

arxiv:1809.10585 v1 · 2018-09-27 · 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{A4N2EMBSTTSDD5HO4VZ2NH7DVG}

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.

Cited by

1 paper in Pith

Parallel Sparse and Data-Sparse Factorization-based Linear Solvers

Receipt and verification

First computed	2026-05-18T00:04:38.040023Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

071ba230329ce431f4eee573a69fe3a9ba9e1982725f89a7a1612d3da05077fe

Aliases

arxiv: 1809.10585 · arxiv_version: 1809.10585v1 · doi: 10.48550/arxiv.1809.10585 · pith_short_12: A4N2EMBSTTSD · pith_short_16: A4N2EMBSTTSDD5HO · pith_short_8: A4N2EMBS

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/A4N2EMBSTTSDD5HO4VZ2NH7DVG \
  | 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: 071ba230329ce431f4eee573a69fe3a9ba9e1982725f89a7a1612d3da05077fe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b407faa2579b8a6badab5d4c3f682f57621640ed42bc223dfe24b397d96196fe",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-09-27T15:45:20Z",
    "title_canon_sha256": "8b52ae1b3115326c2c9218ca13e2f7db058b0a1a461bc26b372a9ed58baba1b2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.10585",
    "kind": "arxiv",
    "version": 1
  }
}