r-permalink" href="#Features" title="Permalink"></a></h2><ul><li>Array operators in any dimension including derivative, gradient, divergence, Laplacian, curl, and customizable Green&#39;s functions</li><li>Interpolation and particle mesh methods on possibly non-orthogonal grids</li><li>Boundary conditions including periodic, smooth, zero, mirror</li><li>Feature rich convolutions on scalar arrays and vector fields with automatic FFT computation when appropriate</li><li>Fully differentiable compatible with <c