Inequations and PointIn-Command
1.) I you have an inequation like y>0 or x<0 and you create a point with the PointIn-Tool the created point become a slider on one of the axes. The same happens with x>=1. It works fine with inequations with two variables.
2.) I have three inequations a,b and c and defined A = PointtIn[a(x) ∧ b(y) ∧ c(x, y)]. It works more or less fine but if I wanted to move the point to the borders. I could not move the point everytime to the borders. If I do it again and again, the movement of the point sometimes stopps when it on the border, sometimes when the point-circle is touching the border and sometimes when it is "far" away from the border. The behaviour is not influenced if the inequations are < or <=.