Recent content by andresc889

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    What Is the Point of Finding the Relative Error in a Vector?

    Hi all, I have a general question about relative error. Suppose that we have a vector of measurements \hat{b}=\left(\hat{b_{1}},\hat{b_{2}},...,\hat{b_{n}}\right). Furthermore, suppose that these measurements are accurate to 10%. My natural interpretation of this statement is that there is...
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    Sum of two independent Poisson random variables

    Thank you for your reply! Yes. My specific question was about the restriction of x_2 to 0, 1 ,... y. It makes more sense when you give an example. What I'm going to ask next might be dumb and might show that I don't fully understand the transformation technique. Could he have described the...
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    Sum of two independent Poisson random variables

    Hello! I am trying to understand an example from my book that deals with two independent Poisson random variables X1 and X2 with parameters λ1 and λ2. The problem is to find the probability distribution of Y = X1 + X2. I am aware this can be done with the moment-generating function technique...
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    Relationship among LCM, GCD, and coprimes

    Thank you Citan. It finally makes sense!
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    Relationship among LCM, GCD, and coprimes

    Hi everybody, I am having an extremely hard time understanding a specific relationship that originates from the least common multiple of two or more numbers. According to "Number Theory and Its History" by Oystein Ore, it is not difficult to see that when one writes lcm(a,b,c) = p*a =...
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