Subject: the existance of black holes

by the laws of relativety, the rate of time is relative to the  
gravitational field mass is in. 

black holes are the dense remains of a supernova. 
the collapse of the supernova is a process that takes a certain 
amount of time, but if it is believed that black holes are areas in which the rate of time is zero, how can such a situation exist if before reaching this |rate of time / this density of mater| the rate of time in the area slows down thus the rate of the collapse also slows down causing the whole process to slow down eliminating the possibilitty of reaching a relative time rate of zero, but only something close.

if all my facts are correct then this information shows that based 
on the laws of relativity black holes cannot exist, only areas in which the rate of time is relatively slow but never zero, this is because time is
continues.     

Re: the existance of black holes