Pith Number

pith:O52W34LT

pith:2017:O52W34LTZOW7JBIFEZMP73SLMO

not attested not anchored not stored refs pending

An $N \log N$ Parallel Fast Direct Solver for Kernel Matrices

Chenhan D. Yu, George Biros, William B. March

arxiv:1701.02324 v1 · 2017-01-09 · cs.DC · 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{O52W34LTZOW7JBIFEZMP73SLMO}

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	2026-05-18T00:53:04.556553Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

77756df173cbadf485052658ffee4b639e033c4e1bbf4fa8e2600e26f4054b29

Aliases

arxiv: 1701.02324 · arxiv_version: 1701.02324v1 · doi: 10.48550/arxiv.1701.02324 · pith_short_12: O52W34LTZOW7 · pith_short_16: O52W34LTZOW7JBIF · pith_short_8: O52W34LT

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/O52W34LTZOW7JBIFEZMP73SLMO \
  | 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: 77756df173cbadf485052658ffee4b639e033c4e1bbf4fa8e2600e26f4054b29

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "92fee35ddf088ae9eaf91c67b023cb9aaf61b7249085beae14343cc41a5c3577",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DC",
    "submitted_at": "2017-01-09T19:11:10Z",
    "title_canon_sha256": "9239cc17c849c952717afb6de75a93ae6d534344590759b743f7e0ef84103a01"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.02324",
    "kind": "arxiv",
    "version": 1
  }
}