Difference between revisions of "Real number"
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| − | A '''real number''' is a number that falls on the real number line. It can have any value. Some examples of real numbers are:<math>1, 2, -23.25, 0, \frac{\pi}{\phi}</math>, and so on. Numbers that are not real are 3i, 3+2.5i, 3+2i+2j+k, i.e. complex numbers, and quaternions. | + | A '''real number''' is a number that falls on the real number line. It can have any value. Some examples of real numbers are:<math>1, 2, -23.25, 0, \frac{\pi}{\phi}</math>, and so on. Numbers that are not real are <math>3i</math>, <math>3+2.5i</math>, <math>3+2i+2j+k</math>, i.e. [[complex numbers]], and [[quaternions]]. |
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The set of real numbers is denoted by <math>\mathbb{R}</math>. | The set of real numbers is denoted by <math>\mathbb{R}</math>. | ||
Revision as of 09:33, 22 June 2006
A real number is a number that falls on the real number line. It can have any value. Some examples of real numbers are:
, and so on. Numbers that are not real are 
, 
, 
, i.e. complex numbers, and quaternions.
The set of real numbers is denoted by 
.
