Question 319222
The statement a~b < 0 means that  a ~ b is less than zero for ALL values of 'a' and 'b'. However, if {{{a=b}}}, then {{{a-b=a-a=0}}} and {{{b-a=a-a=0}}} which basically means that {{{a-b=b-a=0}}}. So if {{{a=b}}}, then a ~ b = 0 meaning that a ~ b < 0 is NOT true. Does that make sense?