Pith Number

pith:WAEINMPA

pith:2017:WAEINMPAHLR6D352F5HMDYFYIV

not attested not anchored not stored refs pending

Sampling and multilevel coarsening algorithms for fast matrix approximations

Shashanka Ubaru, Yousef Saad

arxiv:1711.00439 v2 · 2017-11-01 · cs.NA · cs.LG · 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{WAEINMPAHLR6D352F5HMDYFYIV}

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	2026-05-18T00:04:23.934219Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b00886b1e03ae3e1efba2f4ec1e0b84554a9a183eb9ff87a0a1bdd9fa6cc8175

Aliases

arxiv: 1711.00439 · arxiv_version: 1711.00439v2 · doi: 10.48550/arxiv.1711.00439 · pith_short_12: WAEINMPAHLR6 · pith_short_16: WAEINMPAHLR6D352 · pith_short_8: WAEINMPA

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/WAEINMPAHLR6D352F5HMDYFYIV \
  | 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: b00886b1e03ae3e1efba2f4ec1e0b84554a9a183eb9ff87a0a1bdd9fa6cc8175

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5e67fb257e086468865f01c4b8944a9f321ab516200a2a0a80620b509102342c",
    "cross_cats_sorted": [
      "cs.LG",
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.NA",
    "submitted_at": "2017-11-01T16:57:51Z",
    "title_canon_sha256": "5ffce55efae9588f90f866fc6755868db526e301d84ecf28736c4fbb0a6b97d0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1711.00439",
    "kind": "arxiv",
    "version": 2
  }
}