4 Supremum Properties for a set


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There are four main properties of Supremum that we should be aware of. In the first video we will see how the supremum of a set a+S is equal to the sum of a and supremum(S).

In the second video we will lear how to relate supremum and infimum of two distinct related sets. We will check when and in what conditions will SupA < Inf B for any given sets A and B.

In the third video we will try and understand what is the relation between the Supremum of any two bounded functions . if f(x)<g(x) for all x, then what is the relationship between the supremum of f and g.

Finally, in the fourth property we twist the previous property and check the relationship between these two functions given the condition that f(x)<g(y) for all x and y. Continue reading

3 Bounded Function videos


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In the following videos we will try to evaluate what are bounded functions. What is the meaning of a bounded function? How is a bounded function different from a bounded set?

We shall be looking at some examples of such functions, explaining the concept of boundedness.

Finally in the last video we will look at an example of a function f(x) = 2- 1/x, which is bounded above but not bounded below. Continue reading

Bounded functions


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Bounded functions Continue reading