Enum Spectrum 

pub enum Spectrum<I> {
    Eigen(TensorRank0List<3>, TensorRank2<3, I, I, Dimensionless>),
    Fallback(TensorRank2<3, I, I, Dimensionless>),
}

A cached eigendecomposition of a symmetric tensor, letting Self::powm/Self::dpowm be evaluated at several exponents while paying for only one cubic eigensolve.

Variants

Eigen(TensorRank0List<3>, TensorRank2<3, I, I, Dimensionless>)

Fallback(TensorRank2<3, I, I, Dimensionless>)

Implementations

impl<I> Spectrum<I>

pub fn new( tensor: &TensorRank2<3, I, I, Dimensionless>, ) -> Result<Self, TensorError>

Caches the eigendecomposition of the tensor, when one is needed.

pub fn powm( &self, exponent: TensorRank0, ) -> Result<TensorRank2<3, I, I, Dimensionless>, TensorError>

Returns the matrix power at the given exponent, reusing the cached eigendecomposition.

pub fn dpowm( &self, exponent: TensorRank0, ) -> Result<TensorRank4<3, I, I, I, I, Dimensionless>, TensorError>

Returns the derivative of the matrix power at the given exponent, reusing the cached eigendecomposition.