Pith Number

pith:6RNRRHJH

pith:2009:6RNRRHJHXE74YMRY67BSNKK5X4

not attested not anchored not stored refs pending

Fast Fourier Transforms for Finite Inverse Semigroups

Martin Malandro

arxiv:0905.1340 v3 · 2009-05-08 · math.GR · math.RT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6RNRRHJHXE74YMRY67BSNKK5X4}

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	2026-05-18T04:16:32.408332Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f45b189d27b93fcc3238f7c326a95dbf280e9043bf269bc85592d395780a2bf4

Aliases

arxiv: 0905.1340 · arxiv_version: 0905.1340v3 · doi: 10.48550/arxiv.0905.1340 · pith_short_12: 6RNRRHJHXE74 · pith_short_16: 6RNRRHJHXE74YMRY · pith_short_8: 6RNRRHJH

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/6RNRRHJHXE74YMRY67BSNKK5X4 \
  | 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: f45b189d27b93fcc3238f7c326a95dbf280e9043bf269bc85592d395780a2bf4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b7b3b0de87f62686dcd2d7838808a8abc0339f474390ebadf0abe05f545a740c",
    "cross_cats_sorted": [
      "math.RT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2009-05-08T20:50:17Z",
    "title_canon_sha256": "3be4385f65c2f285d42b9db108a047918f6e157b8a573f65a369475929a432ee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.1340",
    "kind": "arxiv",
    "version": 3
  }
}