Pith Number

pith:QQ4A5P4O

pith:2015:QQ4A5P4OKW6WSDKZY7TOHBSPOR

not attested not anchored not stored refs pending

Nearly Optimal Deterministic Algorithm for Sparse Walsh-Hadamard Transform

Mahdi Cheraghchi, Piotr Indyk

arxiv:1504.07648 v1 · 2015-04-28 · cs.IT · cs.CC · cs.LG · math.FA · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QQ4A5P4OKW6WSDKZY7TOHBSPOR}

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	2026-05-18T02:17:32.676676Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

84380ebf8e55bd690d59c7e6e3864f744bef67c5c78acf7af1145c1d5c3d82a5

Aliases

arxiv: 1504.07648 · arxiv_version: 1504.07648v1 · doi: 10.48550/arxiv.1504.07648 · pith_short_12: QQ4A5P4OKW6W · pith_short_16: QQ4A5P4OKW6WSDKZ · pith_short_8: QQ4A5P4O

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/QQ4A5P4OKW6WSDKZY7TOHBSPOR \
  | 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: 84380ebf8e55bd690d59c7e6e3864f744bef67c5c78acf7af1145c1d5c3d82a5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "96846ac69d55ac92363f853b98f7c3789943e982c3d0ae161079a34db6377f70",
    "cross_cats_sorted": [
      "cs.CC",
      "cs.LG",
      "math.FA",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2015-04-28T20:22:27Z",
    "title_canon_sha256": "969c24c7478f457674d9c6912a03ce49ffd871821d0556dd17742442c2a13145"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.07648",
    "kind": "arxiv",
    "version": 1
  }
}