Gabriel Landi
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 Aug20 accepted Distance between discrete random variables Aug19 asked Reference suggestion: eigenvalues of tridiagonal matrices Aug16 accepted Solving for specific entries in a Lyapunov Equation Aug16 accepted Approximate solution for the root of a non-linear function Aug14 comment Solving for specific entries in a Lyapunov Equation Actually, I have been looking at the web and haven't yet found a method for solving the eq. for B. Any ideas on where to look? Aug14 comment Solving for specific entries in a Lyapunov Equation Wow, this is great. Thank you! I'll start testing this idea right away and post some results as soon as they come out. Aug9 comment Solving for specific entries in a Lyapunov Equation @dato, Sorry I don't understand. Aug9 comment Solving for specific entries in a Lyapunov Equation The solution of the Lyapunov equation, $R$, will be symmetric and positive definite (it is actually a covariance matrix). What I can prove is that $C$ is anti-symmetric ($C^\text{T} = -C$) Aug9 asked Solving for specific entries in a Lyapunov Equation Jul30 awarded Critic Jul28 comment Partial Fractions Expansion of $\tanh(z)/z$ Yeah. Probably. Hehe. It's just that I never know how to deal with sums in any other way than comparing it to other sums. Again, thank you for the answer J.M. Jul28 answered Self-study resources for basic probability? Jul28 accepted Partial Fractions Expansion of $\tanh(z)/z$ Jul28 comment Partial Fractions Expansion of $\tanh(z)/z$ @jm this is great; does all such formulas rely on manipulating other known products and sums? Isn't there, for instance, a Fourier transform or generating function approach (or something...)? Again, thank you for the support. Jul27 comment Approximate solution for the root of a non-linear function Let $F_\pm(t) = e^t (g \cos(\omega t-\phi) \pm b)$. The first point, $t_0$ say, is computed from either $F_\pm(t_0) = F(0) \mp \alpha$, where $\alpha$ is a positive constant. From there one the roots are computed sequentially as above. Jul27 revised Approximate solution for the root of a non-linear function Updated the instability aspect of the problem. Jul27 comment Approximate solution for the root of a non-linear function Thank you all very much for the support and thank you @LeonidKovalev for the bounty. Jul27 asked Partial Fractions Expansion of $\tanh(z)/z$ Jul27 accepted Variation of a simple random walk Jul26 comment Approximate solution for the root of a non-linear function Yes Mr. Badwaik. I want the first $t_1$ after $t_0$.