Pith Number

pith:KFSKPL2Y

pith:2015:KFSKPL2YLBF33N3LFZHVJ22LA3

not attested not anchored not stored refs pending

Discrete Weierstrass Fourier Transform and Experiments

Brendan Harding, Sheng Zhang

arxiv:1502.07734 v4 · 2015-02-12 · 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{KFSKPL2YLBF33N3LFZHVJ22LA3}

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	2026-05-18T01:23:18.976158Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5164a7af58584bbdb76b2e4f54eb4b06debacbad2bc800be2811a25750fce972

Aliases

arxiv: 1502.07734 · arxiv_version: 1502.07734v4 · doi: 10.48550/arxiv.1502.07734 · pith_short_12: KFSKPL2YLBF3 · pith_short_16: KFSKPL2YLBF33N3L · pith_short_8: KFSKPL2Y

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/KFSKPL2YLBF33N3LFZHVJ22LA3 \
  | 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: 5164a7af58584bbdb76b2e4f54eb4b06debacbad2bc800be2811a25750fce972

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "105569cb459d47c751c4384fc3fb61af5eb86483bb19905dc31723aa163ae727",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2015-02-12T04:44:16Z",
    "title_canon_sha256": "573080b33cf7fa6dd0a7ef7f2d05157937c1743a414adbf390ae76e511882c48"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.07734",
    "kind": "arxiv",
    "version": 4
  }
}