Pith Number

pith:FDTX3SEK

pith:2009:FDTX3SEKKEY6ICFBXWT5NKQUKA

not attested not anchored not stored refs pending

Spectral edge detection in two dimensions using wavefronts

Chris Stucchio, Leslie Greengard

arxiv:0909.5453 v1 · 2009-09-29 · math.NA · cs.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{FDTX3SEKKEY6ICFBXWT5NKQUKA}

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	2026-06-03T23:06:29.364268Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

28e77dc88a5131e408a1bda7d6aa14503185c93b3423837d0c94814f3cedac7f

Aliases

arxiv: 0909.5453 · arxiv_version: 0909.5453v1 · doi: 10.48550/arxiv.0909.5453 · pith_short_12: FDTX3SEKKEY6 · pith_short_16: FDTX3SEKKEY6ICFB · pith_short_8: FDTX3SEK

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/FDTX3SEKKEY6ICFBXWT5NKQUKA \
  | 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: 28e77dc88a5131e408a1bda7d6aa14503185c93b3423837d0c94814f3cedac7f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4304d2bc5c0c5eb006d1a1a9798069dec841fecb74d0e97dfa4d778e3ff7d7b7",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/3.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2009-09-29T22:06:07Z",
    "title_canon_sha256": "73ae810fe38574b109061e3c2db49d3c62a4cdb92f9f67f9bfeaa1c4b71255c7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.5453",
    "kind": "arxiv",
    "version": 1
  }
}