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qttools.kernels.operator#

source module qttools.kernels.operator

Functions

  • operator_inverse — Computes the inverse of a matrix polynomial at sample points.

source operator_inverse(a_xx: tuple[NDArray, ...], z: NDArray, contour_type: xp.dtype, in_type: xp.dtype, num_threads: int = 1024) → NDArray

Computes the inverse of a matrix polynomial at sample points.

Parameters

  • a_xx : tuple[NDArray, ...] — The coefficients of the matrix polynomial.

  • z : NDArray — The sample points at which to compute the inverse.

  • contour_type : xp.dtype — The data type for the contour integration.

  • in_type : xp.dtype — The data type for the input matrices.

  • num_threads : int, optional — The number of cuda threads to use for the kernel. Only relevant for GPU computations.

Returns

  • NDArray — The inverse of the matrix polynomial.