SubspaceGadget

class pygrog.gadgets.SubspaceGadget(base_op, subspace_basis, encoding_axis=-4, *, toeplitz=None, k_chunk=1)

Bases: SubspaceSparseFFT

Low-rank temporal/contrast subspace wrapper for sparse/gridded operators.

Methods

__init__
adjoint	Sparse k-space → subspace coefficient images (A^H).
forward
normal
solve	Solve \(\arg\min_x \|A x - b\|^2 + \lambda^2 \|x\|^2\).