Apply a certified PSD action to a vector or block

Apply a certified PSD action to a vector or block

Usage

psd_apply(
  x,
  X,
  action = c("form", "sqrt", "inverse_sqrt", "pseudoinverse", "image_projector",
    "null_projector")
)

Arguments

x

A certified PSD factor.

X

A finite real-double vector or matrix.

action

Certified action to apply.

Value

A vector or matrix matching the input block shape.