Tom Melly wrote:
> 
> In a book I'm reading, there is a nice 3d shape which the book says is the
> result of the equation:
> 
> x^3 + y^3 = 1
> 
> However, it comments "x and y are regarded as complex variables".
> 
> What does a complex variable mean in this context and what would be the
> iso-surface function for the above?
> 
> Many thanks in anticipation...

There is too little information to give you an answer. What I see is a
complex function which depends on four real variables with a real
constraint. I can't imagine how this could be used in a iso-surface. Is
there any other information in your book about how the shape was constructed?
If not, you could contact the author(s) and ask.

Regards, Alberto.

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