Just as multiplication with zero always results in zero, division by zero=20 always results in infinity. We have no problem comprehending zero but our brains are not wired to=20 comprehend infinity. How about 0/0? /Ruben --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .