U Vs Upside Down U Math / Interval Notation without Endpoints - YouTube - For example, the intersection of the set of whole numbers and the set of counting numbers has only one element, which is '0'.
The upside down u means 'intersection', as in the elements that occur in multiple sets. A ∩ b means the things that are common to a and b. ∪ means union, ∩ means intersection. B…