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 Sep 28 awarded Notable Question Sep 1 comment Combined arrival rate Considering the same proof you provided, the case of $\lambda_a = \lambda_b$ still valid, isn't it? (sorry for the naive confirmation) Sep 1 comment What is the capacity of Earth? Is the Earth stable? Queueing theory will give you a metric in steady-state only. As conditions of life and resources are time-varying, as pointed by @MichaelHardy, such model is not useful. A differential (difference) equation will more suitable type of model. (just for fun: see Logistic Map for a reference) Sep 1 comment Combined arrival rate Yes, I got it. For instance, I also expand this question here. Could you comment there also? (thank you very much) Sep 1 accepted Combined arrival rate Sep 1 comment Combined arrival rate Supposing $(0,T]$ is the time in which the samples happen, why let the Poisson random variables' parameters be $\lambda_a T$ and $\lambda_b T$ instead of $\lambda_a$ and $\lambda_b$? Aug 31 revised Combined arrival rate added 16 characters in body Aug 31 comment Combined arrival rate @DilipSarwate, consider they are independent processes. Could you give an example of why the answer, then, is the sum of the rates? (thank you) Aug 31 asked Combined arrival rate Sep 24 awarded Autobiographer Jul 9 awarded Popular Question Jun 15 revised Guess a function that fits empirical data added 72 characters in body Jun 15 comment Guess a function that fits empirical data @JimmyK4542 yes, but I don't think it impact in the response. VMs (y axis) refers to the amount of virtual machine that host a service after a step in the workload. E.g in a cloud computing environment. Jun 15 revised Guess a function that fits empirical data added 2 characters in body Jun 15 comment Guess a function that fits empirical data @ClaudeLeibovici 250 points. Jun 15 asked Guess a function that fits empirical data Mar 30 awarded Informed Jan 23 comment How to factorize $2x^2+5x+3$? Very informative and algebric answer. If it'd be possible, I'd maked it as an accepted answer together with the `amWhy' answer. Thank you. Jan 23 accepted How to factorize $2x^2+5x+3$? Jan 20 comment How to factorize $2x^2+5x+3$? I'm sorry, I could not understand how you do that $f=2x^2+5x+3 \iff 2f=(2x)^2+5(2x)+6$; shouldn't it be $(2)(2x)^2$? @bill-dubuque