Pith Number

pith:INSQFQON

pith:2022:INSQFQON3JTM3R73XRR3CDNSAK

not attested not anchored not stored refs pending

Iterative execution of discrete and inverse discrete Fourier transforms with applications for signal denoising via sparsification

H. Robert Frost

arxiv:2211.09284 v5 · 2022-11-17 · eess.SP · cs.NA · math.NA · stat.ME

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{INSQFQON3JTM3R73XRR3CDNSAK}

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	2026-05-20T00:05:23.943643Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

436502c1cdda66cdc7fbbc63b10db202b73ad961df528e569f339e92146757ee

Aliases

arxiv: 2211.09284 · arxiv_version: 2211.09284v5 · doi: 10.48550/arxiv.2211.09284 · pith_short_12: INSQFQON3JTM · pith_short_16: INSQFQON3JTM3R73 · pith_short_8: INSQFQON

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/INSQFQON3JTM3R73XRR3CDNSAK \
  | 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: 436502c1cdda66cdc7fbbc63b10db202b73ad961df528e569f339e92146757ee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "46b7f1395b9bf4084525592f7abb0eee9b8b30eebcf01d432863032d7997a3e2",
    "cross_cats_sorted": [
      "cs.NA",
      "math.NA",
      "stat.ME"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "eess.SP",
    "submitted_at": "2022-11-17T01:04:10Z",
    "title_canon_sha256": "798b23d3e607c4c0e1e5a1fed78578fbfa08209a04a23137d002d316508e5a6a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2211.09284",
    "kind": "arxiv",
    "version": 5
  }
}