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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/

Wikipedia has an article https://en.wikipedia.org/wiki/Calculus with further references.

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Changing Bounds and Multiply by -1

Sorry my calculus knowledge is extremely rusty - what is the reason that we can flip the bounds from $-\infty\to 0$ to $0\to\infty$ and then also flip the $x$ value to $-x$?
CuriousPenguin
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How to calculate logarithmized average monthly returns

I am currently reading the following paper https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2750064 . On page 57 the researchers state that they calculate the logarithmized average monthly returns as calculated over four non overlapping…
Jj Blevins
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What does gradient with respect to a function mean

I am trying to understand this paper better Greedy function approximation: A gradient boosting machine, but I start having difficulty at around Equation (6) and (7). What does a gradient w.s.t. to an equation mean ($\partial F(x)$), could anyone…
zyxue
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Verifying sub-exponential property when a random variable is not sub-gaussian pro

I am referring to the Example 2.4 (page 16) in this book chapter https://www.stat.berkeley.edu/~mjwain/stat210b/Chap2_TailBounds_Jan22_2015.pdf Suppose $Z \sim N(0,1)$ and random variable $X=Z^2$. For $\lambda < \frac{1}{2}$, we have…
user77005
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Maximize profits by setting price

I am working on a model to set a price that maximizes profits. The equation for profits is: Profits=price x (# sold) - (fixed cost) x (# sold) I have models that predict (# sold) and (fixed cost) is a constant. So my first thought is to take the…
user3476463
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