http://en.wikipedia.org/wiki/Absolute_time_and_space have a look at this link
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That is called the "absolute value". For example, the absolute value of 5 is 5; the absolute value of -5 is also 5. If you are familiar with complex numbers, the absolute value of 4 + 3i, for example, is also 5.
a non examples is -3 equals -3
The absolute value of 15 is 15. The absolute value of any positive number is the number itself. The absolute value of any negative number is the number times -1. For example: What is the absolute value of 10? Answer: 10. Example #2: What is the absolute value of -2? Answer: 2.
no number; absolute value is always positive. The absolute value of a negative number is positive. For example absolute value of -4 is +4
absolute time is time measured in definite periods such as minutes, days, and years