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A free cross-platform library of fast C++ routines for the plotting of up to 3-ranged data. It can export to bitmap and vector EPS/SVG files. There are window interfaces (GLUT/FLTK/Qt) and console tools. MathGL can be used from C/Fortran/Python/Octav/Lua
A symbolic framework for C++, Python and Octave implementing automatic differentiation by source code transformation in forward and reverse modes on sparse matrix-valued computational graphs.
MoGraSo is a programme for modelling long-period fibre gratings. Using modal methods (LP and hybrid modes), a transfer matrix in the radial direction and coupled mode theory, ensures a flexible, accurate and fast simulation.