Pith Number

pith:HWSKFGDD

pith:2015:HWSKFGDD4MYB5APLLV25I5LLRO

not attested not anchored not stored refs pending

Fast Algorithms for the computation of Fourier Extensions of arbitrary length

Daan Huybrechs, Roel Matthysen

arxiv:1509.00206 v1 · 2015-09-01 · cs.NA · 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{HWSKFGDD4MYB5APLLV25I5LLRO}

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	2026-05-18T01:34:14.851784Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3da4a29863e3301e81eb5d75d4756b8b816f395b905e93f1d371b4c5cdd09d9d

Aliases

arxiv: 1509.00206 · arxiv_version: 1509.00206v1 · doi: 10.48550/arxiv.1509.00206 · pith_short_12: HWSKFGDD4MYB · pith_short_16: HWSKFGDD4MYB5APL · pith_short_8: HWSKFGDD

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/HWSKFGDD4MYB5APLLV25I5LLRO \
  | 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: 3da4a29863e3301e81eb5d75d4756b8b816f395b905e93f1d371b4c5cdd09d9d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8f0c4f595f0c2f89a1a0a795e1bb02b1488558bc342d6d099c21ea4e2e8933a4",
    "cross_cats_sorted": [
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.NA",
    "submitted_at": "2015-09-01T10:02:12Z",
    "title_canon_sha256": "cd5e6faf25abe7f5caf36e500440376794de0bf6155cdf4c74c5ef7df4778aac"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.00206",
    "kind": "arxiv",
    "version": 1
  }
}