Pith Number

pith:65LDJMT7

pith:2019:65LDJMT7NTLD3O3NF2MVEDGRSM

not attested not anchored not stored refs pending

Accuracy Controlled Structure-Preserving ${\cal H}^2$-Matrix-Matrix Product in Linear Complexity with Change of Cluster Bases

Dan Jiao, Miaomiao Ma

arxiv:1908.05218 v1 · 2019-08-14 · math.NA · cs.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{65LDJMT7NTLD3O3NF2MVEDGRSM}

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	2026-07-04T23:56:37.593860Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f75634b27f6cd63dbb6d2e99520cd19320f22e7222dad29c3a121e07b8d1bfda

Aliases

arxiv: 1908.05218 · arxiv_version: 1908.05218v1 · doi: 10.48550/arxiv.1908.05218 · pith_short_12: 65LDJMT7NTLD · pith_short_16: 65LDJMT7NTLD3O3N · pith_short_8: 65LDJMT7

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/65LDJMT7NTLD3O3NF2MVEDGRSM \
  | 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: f75634b27f6cd63dbb6d2e99520cd19320f22e7222dad29c3a121e07b8d1bfda

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d6eb5d0088e8079ae40035c9be8b7b2e0c394b3f35e95de121a74c3ab2a584db",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-08-14T16:42:59Z",
    "title_canon_sha256": "9e05c001f465327a5f3342668bb7eafe656c7bcfc87f5f23a47300a9d08b9f5d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.05218",
    "kind": "arxiv",
    "version": 1
  }
}