FUNCTION :  srep -                                               

CALLING SEQUENCE :  srep(s,c,N)                                              

PARAMETERS :    s,c,N - integers such that N>0, (s,c)=1 and
                        c is a divisor of N
SYNOPSIS :   Let c be a positive divisor of N. Given s in (Z/cZ)^x 
             this proc returns an s1 in (Z/NZ)^x such that         
             s1 == s mod c.      

EXAMPLES :   

DISCUSSION :

SEE ALSO :