Pith Number

pith:7R5JEB2X

pith:2015:7R5JEB2XWHLMGTT5I7I77SOZPU

not attested not anchored not stored refs pending

A robust sub-linear time R-FFAST algorithm for computing a sparse DFT

Kannan Ramchandran, Sameer Pawar

arxiv:1501.00320 v1 · 2015-01-01 · cs.IT · cs.LG · 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{7R5JEB2XWHLMGTT5I7I77SOZPU}

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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	2026-05-18T02:30:09.580753Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc7a920757b1d6c34e7d47d1ffc9d97d28e69e0a1ceaf067242b6ff78fd29a5f

Aliases

arxiv: 1501.00320 · arxiv_version: 1501.00320v1 · doi: 10.48550/arxiv.1501.00320 · pith_short_12: 7R5JEB2XWHLM · pith_short_16: 7R5JEB2XWHLMGTT5 · pith_short_8: 7R5JEB2X

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/7R5JEB2XWHLMGTT5I7I77SOZPU \
  | 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: fc7a920757b1d6c34e7d47d1ffc9d97d28e69e0a1ceaf067242b6ff78fd29a5f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "74028d571a3d9e6ed42695f47ad3c665210b2bb87ae27066b67985ebb2ba5fd6",
    "cross_cats_sorted": [
      "cs.LG",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2015-01-01T21:48:00Z",
    "title_canon_sha256": "b51b990780be97417b6f4bac2d478db05da85c11ab4c936de15d8efadb87d5bf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.00320",
    "kind": "arxiv",
    "version": 1
  }
}