Boolean Symbols and Expressions

Symbol summary:

Logic Gate	Boolean Expression
NOT $x$	$x'$
$x$ AND $y$	$x \cdot y$ (or: $xy$)
$x$ OR $y$	$x + y$
$x$ XOR $y$	$x \oplus y$
$x$ NAND $y$	$(xy)'$
$x$ NOR $y$	$(x + y)'$
$x$ XNOR $y$	$(x \oplus y)'$

We can combine these expressions to create more complex logic expressions, as we saw in Topic 3.