Pith Number

pith:NPLD5HX3

pith:2009:NPLD5HX3EYSEWPLLILYWCZOPQC

not attested not anchored not stored refs pending

The truncated Fourier operator. VI

Ronni Machluf, Victor Katsnelson

arxiv:0905.3996 v5 · 2009-05-25 · math.FA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NPLD5HX3EYSEWPLLILYWCZOPQC}

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	2026-05-18T03:48:13.955683Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6bd63e9efb26244b3d6b42f16165cf80ae7625e08942216b6569430df776321e

Aliases

arxiv: 0905.3996 · arxiv_version: 0905.3996v5 · doi: 10.48550/arxiv.0905.3996 · pith_short_12: NPLD5HX3EYSE · pith_short_16: NPLD5HX3EYSEWPLL · pith_short_8: NPLD5HX3

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/NPLD5HX3EYSEWPLLILYWCZOPQC \
  | 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: 6bd63e9efb26244b3d6b42f16165cf80ae7625e08942216b6569430df776321e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "56c8d44fc97675cbbfc2488c198e30c96e77a72db7dba7915fd4fb001c5ad194",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.FA",
    "submitted_at": "2009-05-25T11:11:30Z",
    "title_canon_sha256": "17442a42ad537e4dc004bee91ba83476e9ba39989e161db2f9983798c635917d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.3996",
    "kind": "arxiv",
    "version": 5
  }
}