| http://www.w3.org/ns/prov#value | - and so on but you would also have to declare your variables and other things for it to even work.But how it works is if the number is positive then it intersects the x axis 2 times if it is equal to zero it intersects it once and if it is negitive there is no intersection that occurs... very simple if you can see a quardanant plane in front of you ;)
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