Question: 1.4. For a general increasing function F there is a similar decomposition F -Fe + F d, where both Fe and Fd are IncreasIng, Fe
1.4. For a general increasing function F there is a similar decomposition F -Fe + F
d, where both Fe and Fd are IncreasIng, Fe IS contInUOUS, and F d is "purely jumping". [HINT: Let a be a point of continuity, put Ed (a)
F(a), add jumps in
(a, (0) and subtract jumps in (-00,
a) to define F
d. Cf.
Exercise 2 in Sec. 1.1.]
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