diff --git a/example.ipynb b/example.ipynb
index dc235e1..ad9cd64 100644
--- a/example.ipynb
+++ b/example.ipynb
@@ -6,22 +6,22 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# prerequisites: KrylovKit, TensorOperations, LinearAlgebra, CUDA#tb/cutensor (for GPU mode)\n",
+    "# prerequisite packages: KrylovKit, TensorOperations, LinearAlgebra, CUDA#tb/cutensor\n",
     "\n",
     "include(\"CPU.jl\") # using CPU mode\n",
     "T = Float32\n",
     "\n",
-    "V_test(r2::T)::T =\n",
+    "V_gauss(r2::T)::T =\n",
     "    -4 * exp(-r2 / 4)\n",
     "\n",
     "d = 3\n",
     "n = 3\n",
     "N = 6\n",
-    "L::T = 12.0\n",
+    "L::T = 12\n",
     "mu::T = 0.5\n",
     "n_imag = 1\n",
     "\n",
-    "H = HOperator{T}(V_test, 3, 3, N, L, 0.5f0, 1)\n",
+    "H = HOperator{T}(V_gauss, d, n, N, L, mu, n_imag)\n",
     "@time evals, evecs, info = eig(H, 5)\n",
     "print(info.numops, \" operations : \")\n",
     "println(evals)"