Hi, I'm perfoming some basic differential calculations in General Relativity.
I defined a function a(t), where t is one of the chart coordinates: a = function('a')(t) #only metric function
Then I'm calculating stuff like Cristoffel symbols, Einstein equations, etc.
This function appears to be a complex one (i.e. I see the bar over it sometimes - complex conjugate). This is boring since the calculations does not simplify by themselves.
Is there a way to "assume" that the codomain of the function are the Real Numbers? It would be great also to specify only a range, like (0,+\infty).
Thanks