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luckyman
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1. Show that Ao, the collection of all cylinders of all rank is a field.
A cylinder of rank n is a set of the form { w∈S^∞ : R1(w)R2(w)...Rn(w) ∈ H}
where H is a set of n-long sequences of elements of S. That is H is a subset of S^n
Example:
now think about a toss a coin question.
0(tail=fail) and 1(head = success)
here Ai is the event that ith toss is a head
A1= { w: R1(w)∈{1}}
A2= { w: R1(w)R2(w)∈{11,01}
A3= { w: R1(w)R2(w)R3(w)∈{111,101,011,001}
.
.
.so all the Ai are cylinder sets.
Now my question is let Ao be the collection of all cylinders of all rank, then is Ao a field ?
A cylinder of rank n is a set of the form { w∈S^∞ : R1(w)R2(w)...Rn(w) ∈ H}
where H is a set of n-long sequences of elements of S. That is H is a subset of S^n
Example:
now think about a toss a coin question.
0(tail=fail) and 1(head = success)
here Ai is the event that ith toss is a head
A1= { w: R1(w)∈{1}}
A2= { w: R1(w)R2(w)∈{11,01}
A3= { w: R1(w)R2(w)R3(w)∈{111,101,011,001}
.
.
.so all the Ai are cylinder sets.
Now my question is let Ao be the collection of all cylinders of all rank, then is Ao a field ?
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