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operationsres
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Homework Statement
Suppose that we have [itex]N : \mathbb{R}\cup\{-\infty,\infty\} \to [0,1][/itex] which is the standard normal cumulative distribution function. It is right-continuous.
What I want to evaluate is [itex]\lim_{b\to 0^+}N(\frac{a}{b})[/itex], where [itex]a \in \mathbb{R}^+[/itex], and alternatively where [itex]a \in \mathbb{R}^- [/itex]
2. The attempt at a solution
I opened a thread yesterday on the same topic but the consequences of the fact that [itex]N(.)[/itex] is right-continuous wasn't answered/addressed, which is why I decided to re-open and start fresh so that we can focus on this one aspect.
I already know that [itex]N(-\infty)[/itex] and [itex]N(\infty)[/itex] are well defined to equal 0 and 1 respectively, so that's not what I'm asking :).
Please focus on whether I can push the limits inside of N(.) under both a > 0 and a < 0 under the condition that N(.) is right-continuous.
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Refresher: right continuous at [itex]c[/itex] means that [itex]\lim_{x \to c^+}f(x) = f(c)[/itex].
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