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1-D finite difference (igrad1.c)

The 1-D finite difference operator is defined by


Its adjoint is


$\displaystyle y = Dx, \qquad\textrm{with}\quad y_t\leftarrow x_{t+1}-x_t.x = D^*y,\qquad\textrm{with}\quad x_t\leftarrow -(y_t - y_{t-1}),\; x_0=-y_0.$    



Subsections


2011-07-02