# Module Complex

    module Complex: sig .. end

Complex numbers.

This module provides arithmetic operations on complex numbers. Complex numbers are represented by their real and imaginary parts (cartesian representation). Each part is represented by a double-precision floating-point number (type `float`).

`type ``t = {`

`` | `re : `float`;`
`` | `im : `float`;`

}
The type of complex numbers. `re` is the real part and `im` the imaginary part.

    val zero : t

The complex number `0`.

    val one : t

The complex number `1`.

    val i : t

The complex number `i`.

    val neg : t -> t

Unary negation.

    val conj : t -> t

Conjugate: given the complex `x + i.y`, returns `x - i.y`.

    val add : t -> t -> t

Addition

    val sub : t -> t -> t

Subtraction

    val mul : t -> t -> t

Multiplication

    val inv : t -> t

Multiplicative inverse (`1/z`).

    val div : t -> t -> t

Division

    val sqrt : t -> t

Square root. The result `x + i.y` is such that `x > 0` or `x = 0` and `y >= 0`. This function has a discontinuity along the negative real axis.

    val norm2 : t -> float

Norm squared: given `x + i.y`, returns `x^2 + y^2`.

    val norm : t -> float

Norm: given `x + i.y`, returns `sqrt(x^2 + y^2)`.

    val arg : t -> float

Argument. The argument of a complex number is the angle in the complex plane between the positive real axis and a line passing through zero and the number. This angle ranges from `-pi` to `pi`. This function has a discontinuity along the negative real axis.

    val polar : float -> float -> t

`polar norm arg` returns the complex having norm `norm` and argument `arg`.

    val exp : t -> t

Exponentiation. `exp z` returns `e` to the `z` power.

    val log : t -> t

Natural logarithm (in base `e`).

    val pow : t -> t -> t

Power function. `pow z1 z2` returns `z1` to the `z2` power.