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Title Description
Uncountable In human terms, Uncountable means too many to practically count or enumerate.
In math, an infinite function without a one-to-one correspondence to natural numbers.
Uniform Constant and unchanging; fixed.
Union The Union of two or more sets is the set of elements from all the sets.
The Union of sets A and B is literally the set "A and B."
Unit Circle A Circle of radius one centered at the origin is termed the Unit Circle.
Unit Vector A vector of length one directed along one of the coordinate axes.
Upper Bound The greatest permissible value of a function may be termed its Upper Bound.
Upper Quartile Also the high quartile, the 75th percentile.
Upper Quintile Also high quintile, the 80th percentile.
Upsilon Upsilon is the 20th letter of the Greek alphabet.

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