# Questions tagged [calculus]

For statistical questions involving calculus. Please use also a more statistical tag. For purely mathemathical questions about the calculus, it is better to ask at math SE https://math.stackexchange.com/

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### How we can check that three variable function is increasing or decreasing ? Please tell me the method of this [closed]

[![ ((1)/(sqrt(x_1))) (((1)/(sqrt(2)))-((1)/(sqrt(3))))+((1)/(sqrt(x_2 x_3)))-((1)/(sqrt(3x_2)))-((1)/(sqrt(3x_3))). The conditions are 1≤x_1≤4, 1≤x_2≤4, 1≤x_3≤4 and x_1≤x_2≤≤x_3. I am solving some ...
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### What are some good calculus resources relevant for Machine learning researcher aspirant?

I am trying to self-taught myself on Calculus for machine learning and read the book by Spivak. But it is too rigorous and need a lot of time to finish it. As far as I am concerned, Calculus is only ...
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### BLUE from calculus

Let $p'\beta$ be an estimable LPF. Suppose that $l'y$ is the candidate which must satisfy the unbiasedness condition and the minimum-variance condition. Formulate this as an optimization problem with ...
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### Calculus for Statistics

If one were to learn calculus solely for the purpose of learning statistics, what should he focus on? If this is a ridiculous question and the honest answer is “All of it,” that is of course an ...
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### Multicollinearity in quadratic (polynomial) regression function [duplicate]

Multicollinearity problem could arise when we add quadratic variable in regression like this: So, one of the possible solutions to eliminate the problem is to add centered variables: This was ...
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### Directional derivative in regression (coefficients, after all, are partial derivatives)

The coefficients in a (let's stick with linear for now) regression are the partial derivatives. A regression equation is a function of several variables, so all of the multivariable calculus tricks ...
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