fix: math module

utils.py

@@ -1,5 +1,5 @@
 import numpy as np
-
+import math
 
 def layer_wise_dot_product(*matrices: np.ndarray) -> np.ndarray:
     """
@@ -36,7 +36,7 @@ def bessel(z):
     bessel_sum = 0
     for k in range(25):
         bessel_i = ((-1) ** k * (z / 2) ** (2 * k + 1)) / (
-            np.math.factorial(k) * np.math.factorial(k + 1)
+            math.factorial(k) * math.factorial(k + 1)
         )
         bessel_sum = bessel_sum + bessel_i
     return bessel_sum
@@ -49,7 +49,7 @@ def struve(z):
     struve_sum = 0
     for k in range(25):
         struve_i = (((-1) ** k * (z / 2) ** (2 * k + 2))) / (
-            np.math.factorial(int(k + 1 / 2)) * np.math.factorial(int(k + 3 / 2))
+            math.factorial(int(k + 1 / 2)) * math.factorial(int(k + 3 / 2))
         )
         struve_sum = struve_sum + struve_i
     return struve_sum