Pith Number

pith:DOOP7352

pith:2018:DOOP7352OHWUYK6Z6KRPTP3F5S

not attested not anchored not stored refs pending

Real Sparse Fast DCT for Vectors with Short Support

Gerlind Plonka, Sina Bittens

arxiv:1807.07397 v2 · 2018-07-19 · 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{DOOP7352OHWUYK6Z6KRPTP3F5S}

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	2026-05-18T00:10:09.728195Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1b9cffefba71ed4c2bd9f2a2f9bf65ec8a78275c7941024104f2208ba6e50837

Aliases

arxiv: 1807.07397 · arxiv_version: 1807.07397v2 · doi: 10.48550/arxiv.1807.07397 · pith_short_12: DOOP7352OHWU · pith_short_16: DOOP7352OHWUYK6Z · pith_short_8: DOOP7352

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/DOOP7352OHWUYK6Z6KRPTP3F5S \
  | 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: 1b9cffefba71ed4c2bd9f2a2f9bf65ec8a78275c7941024104f2208ba6e50837

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "19d93cc8b27a161dce3dccde6863b1e1c218abc1d0f6252795539394f7a66574",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-07-19T13:27:35Z",
    "title_canon_sha256": "e225612d7fe85443b7c95a0ff8f8d9c44f9d8f5178a013e4f2dbfbbea8a74a17"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.07397",
    "kind": "arxiv",
    "version": 2
  }
}