Is it true that if something is possible mathmatically it also possible in reality? If so what is this concept called?

Is it true that if something is possible mathmatically it also possible in reality? If so what is this concept called?

 

Not if by "possible in reality" you mean describing the attributes and behaviors of physical objects. (Math doesn't really get interesting until you get beyond the stuff useful to physicists. ) You might be able to use weirder math to describe more complex phenomena in unusual ways, but ultimately math is just the language. It's like saying any grammatically correct English sentence you can say has to be true (or potentially true).

Now, if you mean by "possible mathematically" that the mathematical equations of physics allow for something to occur, then sure. There have been several phenomena in physics that were shown possible through mathematics and actually observed in reality later.