Function einsum_with_subscripts 

pub fn einsum_with_subscripts<T: Scalar + HasAlgebra>(
    subscripts: &Subscripts,
    operands: &[&Tensor<T>],
) -> Result<Tensor<T>>

Execute einsum with pre-built Subscripts.

Avoids re-parsing the subscript string on each call. Useful when the same contraction pattern is applied to tensors of varying shapes.

Errors

Returns an error if tensor shapes are incompatible with the subscripts.