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convert/relation

convert Complex and Real ranges into relations expressed using =, <=, <, >=, and >

 

Calling Sequence

Parameters

Description

Examples

Calling Sequence

convert( expr, relation )

Parameters

expr

-

expression

Description

• 

The convert(expr, relation) function converts Real ranges and Complex ranges found in expr into relations using =,<=,<,>=,>.

  

Note: in Maple, by convention, when you say, for instance, z <= 1, it is implicitly assumed that ℑ(z) = 0.

Examples

> 

z::ComplexRange⁡−1−I&comma;1+I

z::ComplexRange⁡−1−I&comma;1+I

(1)
> 

convert⁡&comma;relation

−1≤ℜ⁡z∧ℜ⁡z≤1∧−1≤ℑ⁡z∧ℑ⁡z≤1

(2)
> 

zinComplexRange⁡−∞⁢I&comma;I

z∈ComplexRange⁡−∞⁢I&comma;I

(3)
> 

convert⁡&comma;RealRange

ℜ⁡z∈0,ℑ⁡z∈−∞&comma;1

(4)
> 

convert⁡&comma;relation

ℜ⁡z=0&comma;−∞≤ℑ⁡z∧ℑ⁡z≤1

(5)

When constructions like z < a or z <= a are around, it is understood that z is real

> 

FunctionAdvisor⁡branch_cuts&comma;arcsin

arcsin⁡z&comma;z≤−1∨1≤z

(6)
> 

FunctionAdvisor⁡branch_cuts&comma;arccot

arccot⁡z&comma;z∈ComplexRange⁡−∞⁢I&comma;−I∨z∈ComplexRange⁡I&comma;∞⁢I

(7)
> 

convert⁡&comma;relation

arccot⁡z&comma;ℜ⁡z=0∧−∞≤ℑ⁡z∧ℑ⁡z≤−1∨ℜ⁡z=0∧1≤ℑ⁡z∧ℑ⁡z≤∞

(8)

See Also

assume[parametric]

ComplexRange

convert

FunctionAdvisor

RealRange

relation