- #1
E'lir Kramer
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I am reading http://walrandpc.eecs.berkeley.edu/126notes.pdf on the theory of random processes. The authors are making use of some unfamiliar notation early on, and I don't want to move on without understanding their formalisms.
First one is the := operator and a union operator that looks like it's being used as a variable.
From the text, section 2.3:
"We want to be able to say that if the events [itex]A_{n}[/itex] for [itex]n = 1,2,...,[/itex] are such that [itex]A_{n} \subset A_{n+1}[/itex] for all [itex]n[/itex] and if [itex]A:=\bigcup _{n}A_{n}[/itex], then [itex]P(A_{n}) \uparrow P(A)[/itex] as [itex]n \rightarrow \infty[/itex]."
What does [itex]A:=\bigcup _{n}A_{n}[/itex] mean? How do you pronounce that phrase in English?
What does the up arrow mean in the next phrase? Is this a strange way of expressing "the limit of [itex]P(A_{n}) [/itex] as n goes to infinity is [itex] P(A)[/itex]? (Which makes sense in context).
First one is the := operator and a union operator that looks like it's being used as a variable.
From the text, section 2.3:
"We want to be able to say that if the events [itex]A_{n}[/itex] for [itex]n = 1,2,...,[/itex] are such that [itex]A_{n} \subset A_{n+1}[/itex] for all [itex]n[/itex] and if [itex]A:=\bigcup _{n}A_{n}[/itex], then [itex]P(A_{n}) \uparrow P(A)[/itex] as [itex]n \rightarrow \infty[/itex]."
What does [itex]A:=\bigcup _{n}A_{n}[/itex] mean? How do you pronounce that phrase in English?
What does the up arrow mean in the next phrase? Is this a strange way of expressing "the limit of [itex]P(A_{n}) [/itex] as n goes to infinity is [itex] P(A)[/itex]? (Which makes sense in context).