Expression 2: "b" equals left parenthesis, 0 , 0 , 2 , right parenthesisb=0,0,2
2
Expression 3: distance left parenthesis, "a" , left parenthesis, "x" , "y" , "z" , right parenthesis , right parenthesis Superscript, 1 half , Baseline plus distance left parenthesis, "b" , left parenthesis, "x" , "y" , "z" , right parenthesis , right parenthesis Superscript, 1 half , Baseline greater than or equal to distance left parenthesis, "a" , left parenthesis, "x" , "y" , "z" , right parenthesis , right parenthesisdistancea,x,y,z12+distanceb,x,y,z12≥distancea,x,y,z
