12.1.1 Top new questions this week

12.1.1.1 Plotting paths between Gaussian primes in the complex plane
12.1.1.2 Why n-th derivative is ok but (n+1)-th is not?
12.1.1.3 Reproduce formatting of diagram: horizontal spacing, overlapping grids
12.1.1.4 How to improve nonlinear fitting involving trigonometric functions
12.1.1.5 Observation about concave mesh
12.1.1.6 Verifying identity of Hypergeometric2F1
12.1.1.7 FunctionDomain of Hold Piecewise function
12.1.1.1 Plotting paths between Gaussian primes in the complex plane

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=318347

For a university project I have to plot paths between Gaussian primes (starting at 1+i) with steps with distance less or equal to 2. I have an example given by my professor, for the case of the conex ... 
[plotting] [graphics] [complex]
 
asked by Francisco Madeira https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=115452 Score of 7
answered by azerbajdzan https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=53172 Score of 10
12.1.1.2 Why n-th derivative is ok but (n+1)-th is not?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=318374

This is not a real problem but sometimes bother me a bit. 
Consider 
 D[x^a,{x,n}] 
(*x^(a - n) FactorialPower[a, n]*) 
 
which is good but 
... 
[calculus-and-analysis]
 
asked by Acacia https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=86893 Score of 6
answered by Michael E2 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4999 Score of 4
12.1.1.3 Reproduce formatting of diagram: horizontal spacing, overlapping grids

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=318358

The wikipedia article on x86 instructions contains this table. 
 
I want to reproduce its formatting more closely. 
I don't want to reproduce weird/subtle formatting quirks; i.e. slight font size ... 
[formatting] [visualization] [grid-layouts]
 
asked by  https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=115405 Score of 4
answered by lericr https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=84894 Score of 8
12.1.1.4 How to improve nonlinear fitting involving trigonometric functions

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=318384

Is there a way to improve this fitting? 
... 
[fitting]
 
asked by MMA13 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=26937 Score of 3
answered by yarchik https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=9469 Score of 7
12.1.1.5 Observation about concave mesh

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=318378

When testing ConcaveHullMesh I made an interesting observation. 
Apply it iteratively. Lets start with a small number of randomly selected points and build their concave mesh. 
Next we define centroids ... 
[geometry] [mesh] [iteration] [fractals]
 
asked by lesobrod https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=5950 Score of 3
12.1.1.6 Verifying identity of Hypergeometric2F1

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=318368

Wolfram shows the following identity  : 
 
I tried to verify this equation ( Subscript[(u), k] = Pochhammer[u, k] ) for randomly chosen parameters ... 
[special-functions]
 
asked by Ulrich Neumann https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=53677 Score of 3
answered by azerbajdzan https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=53172 Score of 4
12.1.1.7 FunctionDomain of Hold Piecewise function

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=318355

I am trying to use  FunctionDomain[]  as part of a much bigger code. 
 FunctionDomain[x/x, x] 
 
produces 1, since the function is ... 
[piecewise] [hold] [functiondomain]
 
asked by Aharon Naiman https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=45626 Score of 3
answered by Michael E2 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4999 Score of 5