E-Book Content
17.2.1999/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
p⇒q
p implies q / if p, then q
∀
p⇔q
for all 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 contains B / B is a subset of A
A⊂B
A is contained in B / A is a subset of B
A∩B
A cap B / A meet B / A intersection B
A\B
A minus B / the difference between A and B
A∪B
A cup B / A join B / A union 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 y
x minus y, x plus y
=
the equals sign
x=5
x equals 5 / x is equal to 5
x 6= 5
x (is) not equal to 5
x over y
1
x≡y
x is equivalent to (or identical with) y
x 6≡ y
x is not equivalent to (or identical with) y
x>y
x is greater than y
x≥y
x is greater than or equal to y
x
E-Book Information