8.27.2 Greatest hits from previous weeks

8.27.2.1 Figuring when the minute and hour hand coincide on a clock
8.27.2.2 Plotting a Phase Portrait
8.27.2.3 Is there something like DensityPlot3D to visualize atomic orbitals?
8.27.2.4 How to find integer solutions?
8.27.2.5 How could Wolfram Research increase Wolfram Language adoption?
8.27.2.6 Why am I getting that $0.999999999999988 \geq 1.0$ is True?
8.27.2.7 Mathematica 10.0.x freezes in Initializing kernels
8.27.2.1 Figuring when the minute and hour hand coincide on a clock

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=573

I would like to list all possible times in a 12-hour period, where the hour hand overlaps the minute hand completely.  This is really a question about three distinct things - to be done in Mathematica ... 
[equation-solving]
 
asked by Steve D https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=191 Score of 16
answered by Verbeia https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=8 Score of 22
8.27.2.2 Plotting a Phase Portrait

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=14160

I'm trying to plot a phase portrait for the differential equation 
$$x'' - (1 - x^2) x' + x = 0.5 \cos(1.1 t)\,.$$ 
The primes are derivatives with respect to $t$. I've reduced this second order ODE to ... 
[plotting] [differential-equations]
 
asked by covertbob https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4528 Score of 44
answered by David Slater https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1746 Score of 41
8.27.2.3 Is there something like DensityPlot3D to visualize atomic orbitals?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=32378

I'm visualizing some hydrogen like atomic orbitals.  For looking at plane slices of the probability density, the  DensityPlot  function works well, and with something ... 
[plotting] [physics] [chemistry]
 
asked by Peeter Joot https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=10 Score of 45
answered by xslittlegrass https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1364 Score of 26
8.27.2.4 How to find integer solutions?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=42359

Following is the equation: 
Need to solve for integer values of x,y when a,b lies between -1000 and 1000. 
Problem is to find the number of integer values of pair (x,y) that satisfy it. 
[equation-solving]
 
asked by Sahil Sareen https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=12396 Score of 2
answered by bill s https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1783 Score of 4
8.27.2.5 How could Wolfram Research increase Wolfram Language adoption?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=259272

Introduction 
Hello, this is a more general question than is typically asked here. However, I chose to post it here because this seems to be the most active community for Wolfram Language / Mathematica ... 
[language-design] [deployment] [development]
 
asked by Alec Graves https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=66081 Score of 47
answered by Alec Graves https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=66081 Score of 38
8.27.2.6 Why am I getting that $0.999999999999988 \geq 1.0$ is True?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=241791

I am getting these results: 
... 
[numerics] [precision-and-accuracy]
 
asked by Craig Carter https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=12461 Score of 22
answered by Greg Hurst https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4346 Score of 25
8.27.2.7 Mathematica 10.0.x freezes in Initializing kernels

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=92931

Bug caused by paclet update and fixed by paclet update. 
I updated to Windows 10 and have been running Mathematica fine on it for over a month.  For some reason, it has just stopped working. I don't ... 
[bugs] [front-end] [system] [kernel-startup] [paclets]
 
asked by mitcheljh https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=6783 Score of 80
answered by ilian https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=145 Score of 100