                ptrdiff_t *local_n0, ptrdiff_t *local_0_start,
                                            ptrdiff_t *local_n1, ptrdiff_t *local_1_start);
ptrdiff_t fftw_mpi_local_size_transposed(int rnk, const ptrdiff_t *n, MPI_Comm comm,
                                         ptrdiff_t *local_n0, ptrdiff_t *local_0_start,
                                         ptrdiff_t *local_n1, ptrdiff_t *local_1_start);
</pre></div>

<p>These functions return the number of elements to allocate (complex
numbers for