In mathematics there are some data , we have took them by convention and mathematics is
not able to show us them proves , now want just to know if the "convention" term enough
mathematics condition to say a student if he asked about the prove of $0! =1$ , "should
be for u to take it as convention".
I would like someone to show me where is the science that proved $0!=1$ while mathematics
not able to prove $0!=1$ ? is it applied in chemistry field ?
just i want how i can deal with a student in high school if he asked ?
i would interest for any replies or any comments