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import numpy as np from numpy.typing import NDArray FloatingArray = NDArray[np.float32] | NDArray[np.float64] ComplexArray = NDArray[np.complex64] | NDArray[np.complex128] FloatingComplexArray = FloatingArray | ComplexArray def symiirorder1_ic(signal: FloatingComplexArray, c0: float, z1: float, precision: float) -> FloatingComplexArray: ... def symiirorder2_ic_fwd(signal: FloatingArray, r: float, omega: float, precision: float) -> FloatingArray: ... def symiirorder2_ic_bwd(signal: FloatingArray, r: float, omega: float, precision: float) -> FloatingArray: ... def sepfir2d(input: FloatingComplexArray, hrow: FloatingComplexArray, hcol: FloatingComplexArray) -> FloatingComplexArray: ...