9.43.1 Top new questions this week

9.43.1.1 Turn off keyboard shortcut
9.43.1.2 How can we reproduce Charles Demuth's "Figure 5 in Gold"?
9.43.1.3 How to solve this trig equation with Mathematica?
9.43.1.4 Length of a continental perimeter
9.43.1.5 Find closed-form solution of this problem
9.43.1.6 Wrong solution in a geometry problem
9.43.1.7 Visualizing branch cut and Riemann surface for a square root
9.43.1.1 Turn off keyboard shortcut

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=295196

Every once in a while when editing a formula, I want to add a parenthesis at the beginning of the line by pressing Shift9 to get  . However, I will accidentally ... 
[keyboard]
 
asked by user297024 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=87796 Score of 10
answered by Sjoerd Smit https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=43522 Score of 8
9.43.1.2 How can we reproduce Charles Demuth's "Figure 5 in Gold"?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=295191

Charles Demuth (1883 - 1935) was an American painter who developed a style of painting known as Precisionism. Precisionist artists reduced subjects to their essential geometric shapes and were ... 
[graphics] [generative-art]
 
asked by eldo https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=14254 Score of 10
answered by cvgmt https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=72111 Score of 14
9.43.1.3 How to solve this trig equation with Mathematica?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=295139

The  Reduce  command of Mathematica is powerful. However, both  Reduce  and  FindInstance  are not ... 
[equation-solving]
 
asked by user64494 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=7152 Score of 9
answered by chyanog https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=2090 Score of 16
9.43.1.4 Length of a continental perimeter

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=295200

Excluding the islands, how can the length of the perimeter of a continent be calculated? 
To make the question more concrete, what is the length of perimeter of the African continent, excluding the ... 
[regions] [geography] [geographics]
 
asked by Syed https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=81355 Score of 7
answered by creidhne https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=41569 Score of 8
9.43.1.5 Find closed-form solution of this problem

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=295099

Would Mathematica be able to solve for the closed-form solution to the following type of problem? 
For $i\in\{0,1,2,...\}$ we have that$$C_{3*i+1}=C\\C_{3*i+2}=-C\\C_{3*i+3}=C$$Assume $r\gt0$. What is ... 
[calculus-and-analysis]
 
asked by OHoxer https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=95853 Score of 7
answered by Vaclav Kotesovec https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=29655 Score of 12
9.43.1.6 Wrong solution in a geometry problem

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=295319

I try to solve the simple problem of finding (integer numbers) for the sides of a triangle when its perimeter is 90 and its area is twice, three times or four times this number. My approach is this: 
<... 
[geometry] [findinstance]
 
asked by Nitra https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=36933 Score of 6
answered by user64494 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=7152 Score of 5
9.43.1.7 Visualizing branch cut and Riemann surface for a square root

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=295295

I have the following complex function: 
$$g (z) = (1 - a^2/z) (1 - 1 /z),$$ 
where $0 < a < 1$. 
Calculations show that $\sqrt{g(z)}$ has a branch cut along $a^2 \to 1$. Is there a way to visualize ... 
[complex]
 
asked by Akbar https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=95917 Score of 6
answered by azerbajdzan https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=53172 Score of 6