GitLab

Implemented a tensorial version for ChebyshevSym kernel (currently in separate files for clarity/safety, TODO finalize and merge), cleaned up tensorial Uniform kernel.

Introduced tensorial kernels for Uniform FMM (NB: Chebyshev UCB incompatible, TODO Chebyshev Sym), tested for kernel R_{,ij} and its derivative, fixed multidimensionnal fft, + some cleanup.

Change to kernel constructor prototype for Chebyshev and Uniform. Changes propagated to all Test and UTest files (I hope)

Implementation of Symmetric Uniform Kernel, optimized evaluation of derivative of Lagrange polynomials.

Implemented UniformGrid/Lagrange interpolation and factorized interpolation specific elements such as the MatrixKernel, Tensor and Mapping classes + Added required tests.