notation - What does ∈ mean? - Mathematics Stack Exchange Writing {\displaystyle x\in A} x\in A means that "x is an element of A" Equivalent expressions are "x is a member of A", "x belongs to A", "x is in A" and "x lies in A" The expressions "A includes x" and "A contains x" are also used to mean set membership, however some authors use them to mean instead "x is a subset of A"
What does E mean in 9. 0122222900391E-5? [closed] What does that time mean? I tried searching Wikipedia for E and maths but found the e mathematical constant My guess is E stand for Exponential and -5 is the power it is raised to And the displayed time is a really small number But that doesn't make sense when compared to the other time in the question 0 00013899803161621 is bigger than 9
Weird E letter? (sigma) - Mathematics Stack Exchange What does the math notation $\sum$ mean? My school's prescribed book uses the weird letter E character without explaining what it is in the first chapter when it talks about the binomial equation I can't find it on Google either because I don't know what it means or its name Please help me! $$ (x+a)^n = \sum_{k=0}^{n} \binom{n}{k}x^ka^{n-k}$$
notation - What does the Greek E-like symbol mean? - Mathematics . . . $\begingroup$ One could add that in typed math, the summation sign $\sum$ and the capital Sigma $\Sigma$ are rarely exactly the same I'm not sure how widespread this is for handwriting though (I have different symbols, but some colleagues definitely haven't) $\endgroup$
What does big E mean in this equation? [closed] $\begingroup$ Fair enough, I was thinking from a more intuitive standpoint (i e the value taken on average by the r v ), since OP evidently hasn't seen this enough to be familiar with the notion But I'll go ahead and remove that since apparently people take issue with it $\endgroup$
What does $E[XY]$ mean? - Mathematics Stack Exchange Stack Exchange Network Stack Exchange network consists of 183 Q A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers
probability - What is $E(X^2)$ mean in literal terms? - Mathematics . . . Do you get the feeling for this: that the more the data values can stray from the mean (in either direction) the greater will be the variation in the data? So how might we measure this concept? Well, Variance, is defined as the expectation of the square of the distance to the value from the mean Is that sensible? $$\begin{align}\mathsf{Var}(X
1e+0. 8= What? What does E mean? - Mathematics Stack Exchange Hello I came across a math equation and I was wondering what did the "e" stand for? the equation is : y=47931x-1E+0 8 Can someone please help me by showing what the E stands for and the answer for my equation I know that I need to sub in a point for x so the only thing stopping me from answering the question is what to do for the 1E+0 8 part