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seen Oct 20 at 15:06

Aug
19
answered Create a C++ program to evaluate the following series: $\sin x \approx x - \frac{x^3}{3! }+\frac{x^5}{5!}-\frac{x^7}{7!}\cdots\pm\frac{x^n}{n!}$
Aug
18
accepted Random Walk Expected Number of Visits
Aug
18
comment Random Walk Expected Number of Visits
Ah okay, that makes sense. Thanks for your help!
Aug
18
comment Random Walk Expected Number of Visits
So if it were the case that both A and E were destination states, the answer to the question: Suppose a walker starts in vertex C. What is the expected number of visits to B before the walker reaches A? would come from the same matrix as the question: Suppose a walker starts in vertex C. What is the expected number of visits to B before the walker reaches E?
Aug
18
comment Random Walk Expected Number of Visits
First, you are absolutely right about the minus signs. I somehow convinced myself that $$0 - \frac{1}{3} = \frac{1}{3}.$$ And to be clear, that (C, B)th entry of the matrix M accounts for the fact that our destination is vertex A, right? And that would be because we designated A as an absorbing state?
Aug
18
asked Random Walk Expected Number of Visits
Aug
13
comment Invariant Probability Vector
Yep, that's exactly what I know how to do. You've been very helpful; thanks again!
Aug
13
awarded  Student
Aug
12
awarded  Scholar
Aug
12
comment Invariant Probability Vector
The first part of your response makes sense, but before reading this book I'd never heard the term left eigenvector. I took Linear Algebra a year ago so I can find the eigenvalue, but I couldn't tell you how to find the left eigenvector.
Aug
12
comment Invariant Probability Vector
Ahh this makes so much more sense now. Thank you!
Aug
12
accepted Invariant Probability Vector
Aug
12
asked Invariant Probability Vector
Jul
30
awarded  Supporter
Jul
27
comment hints on solving $ \sin^2 x {d^2y \over dx^2} = 2 y$
Another way to come by what @PeterTamaroff got is by using double angle formulas. $$cos(2x) + 1 = 2cos^2(x)$$ $$sin(2x) = 2sin(x)cos(x)$$ Substituting these in will yield the correct answer.
Jul
24
awarded  Teacher
Jul
24
answered Possible distance b/w points
Jul
20
comment Survival function
Are you looking for the median or the mean?
Jul
20
reviewed Approve suggested edit on Find value of K in matrix
Jul
20
answered Find value of K in matrix