806 reputation
2631
bio website
location Seattle, WA
age 70
visits member for 2 years, 6 months
seen 4 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
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?
Apr
17
comment Why the complicated pattern in this 3D plot?
@Kuba, perfect! Make it an answer and I'll sign off.
Apr
17
revised Why the complicated pattern in this 3D plot?
fised bad exponent, replaced plot
Apr
17
asked Why the complicated pattern in this 3D plot?
Apr
9
awarded  Yearling
Feb
17
answered Convert number to exponent form with highest power possible
Feb
15
comment Conditionally replace rows in lists
@kguler, I was tormented by a simple replacement problem until I found your answer. The _? was the key. b /. _?(1 < # &) :> 0 Thanks for the help.
Feb
11
revised Using Reduce on an inequality
fixed syntax
Feb
11
revised Using Reduce on an inequality
added final formula
Feb
11
comment Using Reduce on an inequality
@rasher, looks good. Is there any way to explain the steps?
Feb
11
asked Using Reduce on an inequality
Feb
2
accepted Question about inequality plot