#1




invalid points in Z transform
The book says
Quote:
I suppose any z is a map of a x, not!? 
#2




Re: invalid points in Z transform
Quote:
Any should be mapped to a , but not any can be mapped to a : In other words, nonlinear transform may not be an onto function. For example the nonlinear transform (given in the book), if or then there is no can be mapped to such because there is no such that and no such that . Hope this helps. 
#3




Re: invalid points in Z transform
Thank you, yes that seems helpful if we regard all points in Z space, but I thought it speaks about the points in Z which are the mapping of a point in data set D.

#4




Re: invalid points in Z transform
Quote:

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