discontinuity, monotone function and Froda's theorem

discontinuity, monotone function, and Froda's theorem

0:00 start
1:53 definition of discontinuity
3:30 discontinuity of first kind and second kind
6:00 theorem for discontinuity in the monotone function
11:00 Frida's theorem: Then the set of discontinuities of the first kind is at most countable

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