Developer reference# Contents: FEEC Derham complex Grids Mass Operators (bilinear forms) Projection of spline functions Kronecker approximations of operators Preconditioners Linear solvers PIC Particle base class Marker array layout Particle subclasses Particle-to-grid accumulation Accumulation kernels Pusher class Pusher kernels SPH Pusher kernels Coefficient kernels Evaluation kernels Smoothing kernels