17.2. 1999/H. Valiaho Pronunciation of mathematical expressions The pronunciations of the most common mathematical expressions are given in the list below. In general, the shortest versions are preferred (unless greater precision is necessary) 1. Lo there exists P→q p implies q/if p, then q P分q p if and only if q/p is equivalent to q/p and q are equivalent 2. Sets x∈A c belongs to A/a is an element(or a member) of A A does not belong to A/ a is not an element(or a member) of A ACB A is contained in B/A is a subset of B ad B A contains B/B is a subset of A A∩B A cap B/ A meet B/A intersection B AUB A cup B/A join B/A uNion B A\B A minus B/the difference between A and B A×B A cross B/ the cartesian product of A and B 3. Real numbers x+1 r plus one 1 a minus one x±1 a multiplied by (ar -y(a +y) a minus y, a plus y over y 5 c equals 5/. is equal to 5 ≠5 (is) not equal to 517.2.1999/H. V¨aliaho Pronunciation of mathematical expressions The pronunciations of the most common mathematical expressions are given in the list below. In general, the shortest versions are preferred (unless greater precision is necessary). 1. Logic ∃ there exists ∀ for all p ⇒ q p implies q / if p, then q p ⇔ q p if and only if q /p is equivalent to q / p and q are equivalent 2. Sets x ∈ A x belongs to A / x is an element (or a member) of A x ∈/ A x does not belong to A / x is not an element (or a member) of A A ⊂ B A is contained in B / A is a subset of B A ⊃ B A contains B / B is a subset of A A ∩ B A cap B / A meet B / A intersection B A ∪ B A cup B / A join B / A union B A \ B A minus B / the difference between A and B A × B A cross B / the cartesian product of A and B 3. Real numbers x + 1 x plus one x − 1 x minus one x ± 1 x plus or minus one xy xy / x multiplied by y (x − y)(x + y) x minus y, x plus y x y x over y = the equals sign x = 5 x equals 5 / x is equal to 5 x 6= 5 x (is) not equal to 5 1