Question

Please follow the comment Math notation question: does " ; " means '"and " ? also, does ", " means "and" ?

Example1: B = {(x, y); x ∈ [1, 2], y ∈ [1, 2], x < y}. does " , " means " and " here? could i replace "," to " ; " ?

Example2:S = {(x, y, i) : x = H, T; y = H, T; i = 1, 3, 5} Does " ; " means " and " here?

Answer 1

Comma (,) usually represents OR in math notation but not AND. Semi colon (;) represents sometimes Where and sometimes AND in math notation. However AND and WHERE have same meaning.

" ; " means '"and "

", " does not mean "and"

Example1:

B = {(x, y); x ∈ [1, 2], y ∈ [1, 2], x < y}.

Here " , " does not mean " and "

You could not replace "," to " ; "

Example 2:

S = {(x, y, i) : x = H, T; y = H, T; i = 1, 3, 5}.

Here " ; " means " and "