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##

Representation of complex numbers

The complex numbers are represented by structures

typedef struct FCOMPLEX {
float r,
i;
} fcomplex;
typedef struct DCOMPLEX {
double r,
i;
} dcomplex;
typedef struct FPOLAIRE {
float rm,
th;
} fpolaire;
typedef struct DPOLAIRE {
double rm,
th;
} dpolaire;

The first two structures represent complex numbers in the usual way
(in simple precision for the first one, in double precision for the second),
i.e. the member `r` is the real part and the member `i` is the
imaginary part. The last two structures represent complex numbers in polar
coordinates (in simple precision for the third, in double precision for the
fourth), i.e. the member `rm` is the modulus and the member `th` is
the phase.

The library contains many functions that are useful to manipulate complex
numbers of the two types.

2009-11-12