645 reputation
2731
bio website
location Seattle, WA
age 70
visits member for 2 years, 6 months
seen 3 hours ago

Contact: rudytoody.AT.comcast.DOT.net

I retired in 2006 and bought Mathematica and a stack of math books with the goal to teach myself to become a world-class mathematician. I am on pace to achieve that goal sometime shortly after the next Ice Age.

I consider myself a Mathematical Mutt (no papers) who occasionally ventures off the back porch to play in the yard with the big dogs.

I donate regularly to the The OEIS Foundation.

When I look at the patterns, I can hear the wheels turning. When I look at the math, I find out the hamsters have died.


May
27
revised Is there a better way to create my rotational-symmetric (180 degrees) rectangles?
aligned code to look better, for linking from a math.SE question
May
24
revised Is there a better way to create my rotational-symmetric (180 degrees) rectangles?
added changes as suggested in the answer
May
24
accepted Is there a better way to create my rotational-symmetric (180 degrees) rectangles?
May
24
revised Is there a better way to create my rotational-symmetric (180 degrees) rectangles?
fixed grammer and added more info
May
24
asked Is there a better way to create my rotational-symmetric (180 degrees) rectangles?
May
21
revised Solve within a range?
added `Clear` variables
May
21
comment Solve within a range?
@ssolver, for example: (your dependency here) && at the beginning of the statement. good luck!
May
21
comment Solve within a range?
@ssolver, perhaps you need Clear[x,y,z,kp]. Copy the first statement and remove Full and evaluate and you should get my edit result.
May
21
revised Solve within a range?
showed a different result
May
21
comment Solve within a range?
@ssolver, I took your statement and added the conditions from the 'Where' and did the Reduce[FullSimplify which gave us the next box. The part to the right of kp== is what I plotted.
May
21
revised Solve within a range?
added a plot
May
20
comment What summations can Mathematica do?
ϵ/(nn - 1) (n - 1)^2 this could have zero divide
May
20
comment What summations can Mathematica do?
+1 for second question.
May
20
revised Solve within a range?
inserted `FullSimplify` to show how I got to the `Reduce` expression
May
20
answered Solve within a range?
May
19
comment How could I generate words starting with P,h,D?
From the old joke: Piled Higher, Deeper
May
19
comment Using a variable for two different purposes
@Akater, try oeis.org/wiki/User:Enrique_P%C3%A9rez_Herrero/…
May
18
revised Using a variable for two different purposes
added an additional example
May
18
asked Using a variable for two different purposes
Apr
17
accepted Why the complicated pattern in this 3D plot?