positive (original) (raw)

The positive is usually explained to that the number under consideration is greater than zero. Without the relation “>”, the positivity of () numbers may be defined specifying which numbers of a given number kind are positive, e.g. as follows.

For example, 1+1+1 is a positive integer, 1+11+1+1+1+1 is a positive rational and 5.15115111511115⁢… is a positive real number.

If a is positive and a+b=0, then the opposite number b is negative.