Pith Number

pith:EJHQYGUM

pith:2026:EJHQYGUM6IOKHQQICTR3SWHQNS

not attested not anchored not stored refs pending

A simple derivation of the Fourier transform of the Heaviside function

Robert C. Dalang

arxiv:2605.22193 v1 · 2026-05-21 · 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{EJHQYGUM6IOKHQQICTR3SWHQNS}

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	2026-05-22T01:04:31.178208Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

224f0c1a8cf21ca3c20814e3b958f06cb8a8747a722398f92cd196d3acb6c1d1

Aliases

arxiv: 2605.22193 · arxiv_version: 2605.22193v1 · doi: 10.48550/arxiv.2605.22193 · pith_short_12: EJHQYGUM6IOK · pith_short_16: EJHQYGUM6IOKHQQI · pith_short_8: EJHQYGUM

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/EJHQYGUM6IOKHQQICTR3SWHQNS \
  | 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: 224f0c1a8cf21ca3c20814e3b958f06cb8a8747a722398f92cd196d3acb6c1d1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f090e63c088c03e82400920a6c83c023f2ac95660fc02f0ecb24d9c2bec2466d",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "math.FA",
    "submitted_at": "2026-05-21T08:59:14Z",
    "title_canon_sha256": "8dee1ced98bd4cbe783040623145d39ebd5f7c7fa66566cec3204899240010d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.22193",
    "kind": "arxiv",
    "version": 1
  }
}