generated from smyalygames/quartz
157 B
157 B
X \times Y = \{ x: \{ 1, 2 \} \to x_{1} \cup x_{2} | x_{1} X_{1} \wedge x_{2} \in X_{2} \}
where X = X_{1}
and Y = X_{2}
, basically (X_{1}, X_{2})
.