Struct Symmetry 

struct Symmetry<const N: usize> {
    vanishes: bool,
    k_alone: [bool; N],
}

A sum that vanishes by symmetry (vanishes) is exactly zero, as are its derivatives that move k alone; jets keep the other derivatives and their check of the cancellation.

Fields

vanishes: bool

Whether the sum vanishes by symmetry.

k_alone: [bool; N]

Whether each jet slot moves k alone, with the shift, the Bloch vector and the lattice vectors fixed.

Implementations

impl<const N: usize> Symmetry<N>

fn of( wave: Family, inputs: &Inputs<N>, direct: &[[Jet<N>; 3]; 3], kpar: &[Jet<N>; 3], ) -> Self

The symmetry of the sum with the reduced direct rows direct and the reduced Bloch vector kpar.

fn zeroed(&self, sum: Jet<N>) -> Jet<N>

sum with the components that vanish by symmetry set to exactly zero.

fn checked(&self, inputs: &Inputs<N>, evaluation: Evaluation) -> Checked<N>

The components whose cancellation a sum below every automatic split checks: those that Self::zeroed keeps, without the split derivative of the parts.