10.22.2 Greatest hits from previous weeks

10.22.2.1 Using Export[] sends the file where?
10.22.2.2 What do the X and Y axis stand for in the Fourier transform domain?
10.22.2.3 Positioning axes labels
10.22.2.4 1 Plot, 2 Scale/Axis
10.22.2.5 How to calculate scalar curvature, Ricci tensor and Christoffel symbols in Mathematica?
10.22.2.6 How can I plot a graph of an integral?
10.22.2.7 Finding Limits in several variables
10.22.2.1 Using Export[] sends the file where?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=8586

I am trying to use the  Export  command to convert a list of plots into a *.gif file, and the command runs and executes well, but I can't find the file! Where is it ... 
[export]
 
asked by Patrick Da Silva https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1785 Score of 49
answered by Vitaliy Kaurov https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=13 Score of 61
10.22.2.2 What do the X and Y axis stand for in the Fourier transform domain?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=85139

In Wolfram Mathematica the function  Fourier  has the following declaration 
 
 Fourier[list] 
 
 
And after a list is given to the ... 
[numerics] [fourier-analysis] [faq]
 
asked by user253956 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=29958 Score of 32
answered by Hugh https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=12558 Score of 78
10.22.2.3 Positioning axes labels

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=87388

I need to change the position of my axes labels such that the y-axis label is in the middle and parallel to the y-axis. I'd also like the x-axis label to be in the middle of the x-axis rather than ... 
[plotting] [graphics]
 
asked by John_dydx https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=7849 Score of 16
answered by Virgil https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=27697 Score of 19
10.22.2.4 1 Plot, 2 Scale/Axis

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=627

I would like to plot those two datasets on top of each other. But they have very different range on the $y$ axis. How can I have two different axis? 
 
I found the following on the help menu but quite ... 
[plotting] [customization]
 
asked by 500 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=172 Score of 164
answered by ArgentoSapiens https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=92 Score of 165
10.22.2.5 How to calculate scalar curvature, Ricci tensor and Christoffel symbols in Mathematica?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=8895

I am seeking a convenient and effective way to calculate such geometric quantities. I've used packages like  TensoriaCalc , but they don't work at all time. Sometimes,... 
[symbolic] [physics] [tensors] [differential-geometry]
 
asked by Zoe Rowa https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1713 Score of 54
answered by Yi-Zen Chu https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4869 Score of 26
10.22.2.6 How can I plot a graph of an integral?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=78451

I want to plot the following function: 
 
$$\int \left(\frac{\Gamma (x+1)}{2}-\frac{\Gamma (x-1)}{2}\right) \, dx$$ 
[plotting]
 
asked by Anixx https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=651 Score of 5
answered by k_v https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=24727 Score of 11
10.22.2.7 Finding Limits in several variables

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=21544

Is there a way to find a limit of a multivariable function, like 
 
$$\lim_{(x,y)\to (0,0)} f(x,y)$$ 
with Mathematica? 
 
When $f$ is continuous, we can use 
$$\lim_{(x,y)\to (0,0)} f(x,y)=\lim_{(x,0)\... 
[functions] [calculus-and-analysis]
 
asked by Dominic Michaelis https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=5899 Score of 34
answered by whuber https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=91 Score of 44