Pith Number

pith:VG4JGICT

pith:2017:VG4JGICTDJPQKEO6CY72GRAJZ6

not attested not anchored not stored refs pending

A nonuniform fast Fourier transform based on low rank approximation

Alex Townsend, Diego Ruiz-Antolin

arxiv:1701.04492 v1 · 2017-01-17 · 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{VG4JGICTDJPQKEO6CY72GRAJZ6}

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	2026-05-18T00:52:43.555914Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a9b89320531a5f0511de163fa34409cfbd97aa52afede730e461b54489878940

Aliases

arxiv: 1701.04492 · arxiv_version: 1701.04492v1 · doi: 10.48550/arxiv.1701.04492 · pith_short_12: VG4JGICTDJPQ · pith_short_16: VG4JGICTDJPQKEO6 · pith_short_8: VG4JGICT

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/VG4JGICTDJPQKEO6CY72GRAJZ6 \
  | 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: a9b89320531a5f0511de163fa34409cfbd97aa52afede730e461b54489878940

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6b038d8722d75457d9f011cb1e41f627506dd353899e645f3d78ea983644e874",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2017-01-17T00:34:15Z",
    "title_canon_sha256": "3b78153f028d6df711ccc1d1cfdb001fc37258b7f62fc342fb6210ee85649e52"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.04492",
    "kind": "arxiv",
    "version": 1
  }
}