Markov Chain for a teleportation machine
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I am given the following problem:
Every time I teleport, the teleportation machine decides to transport me to the very same place I am with probability $α ∈ (0,1)$, or, if I don't repeat the same location, it randomly select one of the other $N−1$ places to which I can teleport and places me there instead. Find the limiting probability
$$
lim_{n→∞}
P(text{nth teleportation place is the same as the first place})
$$
I am also given the following hint: Define a suitable two state Markov Chain with states {initial place, other place}.
I approach the problem in the following way: Let $X_n = 0$ be the state in which we are at the initial place. Let $X_n = 1$ be the state in which we are at other place. Then the transition matrix is partially given by
$$
P=
begin{bmatrix}
alpha & 1-alpha \
beta & 1-beta
end{bmatrix}
$$
However, I can't seem to find $beta$. I tried used Bayes' rule and conditional probability but to no avail. Any help would be greatly appreciated
probability markov-chains
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add a comment |
$begingroup$
I am given the following problem:
Every time I teleport, the teleportation machine decides to transport me to the very same place I am with probability $α ∈ (0,1)$, or, if I don't repeat the same location, it randomly select one of the other $N−1$ places to which I can teleport and places me there instead. Find the limiting probability
$$
lim_{n→∞}
P(text{nth teleportation place is the same as the first place})
$$
I am also given the following hint: Define a suitable two state Markov Chain with states {initial place, other place}.
I approach the problem in the following way: Let $X_n = 0$ be the state in which we are at the initial place. Let $X_n = 1$ be the state in which we are at other place. Then the transition matrix is partially given by
$$
P=
begin{bmatrix}
alpha & 1-alpha \
beta & 1-beta
end{bmatrix}
$$
However, I can't seem to find $beta$. I tried used Bayes' rule and conditional probability but to no avail. Any help would be greatly appreciated
probability markov-chains
$endgroup$
add a comment |
$begingroup$
I am given the following problem:
Every time I teleport, the teleportation machine decides to transport me to the very same place I am with probability $α ∈ (0,1)$, or, if I don't repeat the same location, it randomly select one of the other $N−1$ places to which I can teleport and places me there instead. Find the limiting probability
$$
lim_{n→∞}
P(text{nth teleportation place is the same as the first place})
$$
I am also given the following hint: Define a suitable two state Markov Chain with states {initial place, other place}.
I approach the problem in the following way: Let $X_n = 0$ be the state in which we are at the initial place. Let $X_n = 1$ be the state in which we are at other place. Then the transition matrix is partially given by
$$
P=
begin{bmatrix}
alpha & 1-alpha \
beta & 1-beta
end{bmatrix}
$$
However, I can't seem to find $beta$. I tried used Bayes' rule and conditional probability but to no avail. Any help would be greatly appreciated
probability markov-chains
$endgroup$
I am given the following problem:
Every time I teleport, the teleportation machine decides to transport me to the very same place I am with probability $α ∈ (0,1)$, or, if I don't repeat the same location, it randomly select one of the other $N−1$ places to which I can teleport and places me there instead. Find the limiting probability
$$
lim_{n→∞}
P(text{nth teleportation place is the same as the first place})
$$
I am also given the following hint: Define a suitable two state Markov Chain with states {initial place, other place}.
I approach the problem in the following way: Let $X_n = 0$ be the state in which we are at the initial place. Let $X_n = 1$ be the state in which we are at other place. Then the transition matrix is partially given by
$$
P=
begin{bmatrix}
alpha & 1-alpha \
beta & 1-beta
end{bmatrix}
$$
However, I can't seem to find $beta$. I tried used Bayes' rule and conditional probability but to no avail. Any help would be greatly appreciated
probability markov-chains
probability markov-chains
asked Jan 15 at 8:45
Mr_RobotMr_Robot
486
486
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1 Answer
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$begingroup$
If you are in another place, the probability you come back to the initial place is
the probability you do not stay still $(1-alpha)$ multiplied by the probability the initial place is chosen $left(frac{1}{n-1}right)$, so
$$beta = frac{1-alpha}{n-1}$$
$endgroup$
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1 Answer
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1 Answer
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active
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oldest
votes
$begingroup$
If you are in another place, the probability you come back to the initial place is
the probability you do not stay still $(1-alpha)$ multiplied by the probability the initial place is chosen $left(frac{1}{n-1}right)$, so
$$beta = frac{1-alpha}{n-1}$$
$endgroup$
add a comment |
$begingroup$
If you are in another place, the probability you come back to the initial place is
the probability you do not stay still $(1-alpha)$ multiplied by the probability the initial place is chosen $left(frac{1}{n-1}right)$, so
$$beta = frac{1-alpha}{n-1}$$
$endgroup$
add a comment |
$begingroup$
If you are in another place, the probability you come back to the initial place is
the probability you do not stay still $(1-alpha)$ multiplied by the probability the initial place is chosen $left(frac{1}{n-1}right)$, so
$$beta = frac{1-alpha}{n-1}$$
$endgroup$
If you are in another place, the probability you come back to the initial place is
the probability you do not stay still $(1-alpha)$ multiplied by the probability the initial place is chosen $left(frac{1}{n-1}right)$, so
$$beta = frac{1-alpha}{n-1}$$
answered Jan 15 at 8:49
HenryHenry
99.9k480165
99.9k480165
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