normalization of fuzzy matrix

Antonella Faggiani (
Mon, 2 Mar 1998 13:41:36 +0100 (MET)

Need help:i have a fuzzy decision matrix, with 168 alternatives and 4
attributes rapresented with trapezoidal fuzzy numbers; now i neet to
normalized them, before using weight.
How can i do? Normalization of crisp numbers is an easy task, because i
choose the bigger one and divide the others with this number, but what
about fuzzy numbers??