propagate_pullback

treams_core::smatrix::layers

Function propagate_pullback 

Source 
fn propagate_pullback(
    g: Blocks,
    below: &[DMatrix<Complex>; 3],
    phase: [Complex; 2],
) -> (Blocks, [Complex; 2])
Expand description

Pull the cotangent g of propagate back to the stack below and the phases.