Pith Number

pith:7UIDIGV5

pith:2018:7UIDIGV54BC37F27RQQBY7HSH2

not attested not anchored not stored refs pending

Low-Rank Kernel Matrix Approximation Using Skeletonized Interpolation With Endo- or Exo-Vertices

Cleve Ashcraft, Eric Darve, Fran\c{c}ois-Henry Rouet, L\'eopold Cambier, Pierre L'Eplatennier, Yun Huang, Zixi Xu

arxiv:1807.04787 v1 · 2018-07-12 · 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{7UIDIGV54BC37F27RQQBY7HSH2}

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	2026-05-18T00:10:51.427353Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fd10341abde045bf975f8c201c7cf23ebec2086500235b558a1edf6c8eb7cf30

Aliases

arxiv: 1807.04787 · arxiv_version: 1807.04787v1 · doi: 10.48550/arxiv.1807.04787 · pith_short_12: 7UIDIGV54BC3 · pith_short_16: 7UIDIGV54BC37F27 · pith_short_8: 7UIDIGV5

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/7UIDIGV54BC37F27RQQBY7HSH2 \
  | 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: fd10341abde045bf975f8c201c7cf23ebec2086500235b558a1edf6c8eb7cf30

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0aa9428394f75974500d36269d7920411476de8f8da73ef96be7e0c4595deb07",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-07-12T18:54:08Z",
    "title_canon_sha256": "ddfd82bd07480e971fea71717c24db843da0854f92518b6e1d77902e717c5733"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.04787",
    "kind": "arxiv",
    "version": 1
  }
}