This page outlines shorthand notation for number sets in functions, defining Z as integers and R as real numbers. It specifies Z+ for positive integers (counting numbers) and \(Z^+ \cup \...This page outlines shorthand notation for number sets in functions, defining Z as integers and R as real numbers. It specifies Z+ for positive integers (counting numbers) and Z+∪{0} for positive integers plus zero, noting that zero is neither positive nor negative.
