713 reputation
2526
bio website
location Seattle, WA
age 70
visits member for 2 years
seen 27 mins ago

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.


Jun
9
comment Wallis Formula and Pippenger Product---How do we get symbolic output?
@0x4A4D, I want $\frac{\pi}{2}$ and $\frac{e}{2}$ for the results of the first two calculations.
Jun
9
asked Wallis Formula and Pippenger Product---How do we get symbolic output?
May
23
accepted Are there any functions that can determine the disorder between two lists?
May
23
revised Are there any functions that can determine the disorder between two lists?
added motivation
May
23
comment Are there any functions that can determine the disorder between two lists?
@SjoerdC.deVries, I used to own that book. For my research, I want to trend the complexity changes as we step through the number line. I know the result at $\infty$.
May
22
revised Are there any functions that can determine the disorder between two lists?
remove one sentence
May
22
comment Are there any functions that can determine the disorder between two lists?
What happens when dj11 and dj12 are compared? Can Correlation do anything when the numbers are identical, but in different positions?
May
22
comment Are there any functions that can determine the disorder between two lists?
@YvesKlett, I use Union because I can easily describe it in LaTex.
May
22
comment Are there any functions that can determine the disorder between two lists?
@Aky, thanks. I will never have duplicates, so Entropy is out. But I will look at EditDistance.
May
22
comment Are there any functions that can determine the disorder between two lists?
@Aky, you are right, it was Signature. Entropy returns the log of number of items in the list.
May
22
comment Are there any functions that can determine the disorder between two lists?
@J.M., I'm attempting to see if there can be some method to show the increasing complexity of square-free numbers as we move up the number line.
May
22
comment Are there any functions that can determine the disorder between two lists?
@HyperGroups, I'll read up on Inversions in my Combinatorica book.
May
22
comment Are there any functions that can determine the disorder between two lists?
@SimonWoods, thanks for the links.
May
22
comment Are there any functions that can determine the disorder between two lists?
@bills, Entropy returns 1 for ordered and -1 for disordered. I already know I have a lot of disorder. The OP is just a small example of my data.
May
22
comment Are there any functions that can determine the disorder between two lists?
@Artes, all but Signature might do it. More analysis is required.
May
22
comment Are there any functions that can determine the disorder between two lists?
@PlatoManiac, HammingDistance looks promising.
May
22
revised Are there any functions that can determine the disorder between two lists?
added further info
May
22
awarded  Custodian
May
22
reviewed Approve suggested edit on Are there any functions that can determine the disorder between two lists?
May
22
asked Are there any functions that can determine the disorder between two lists?