21,467 reputation
22559
bio website sethares.engr.wisc.edu
location Wisconsin
age 59
visits member for 2 years
seen 3 hours ago

enter image description here

The code to generate this cartoon is in my answer to the XKCD-ification question. When executed in Mathematica, there is even a secret mouse-over message.


3h
comment Simplify expression by restricting variable to be integer
FullSimplify[Sin[2 n Pi], n \[Element] Integers]
4h
comment Suppressing reduction in fraction box size in multi-level fractions
Use Text instead of TraditionalForm
1d
comment Take the function f(x)=2x-x^2 and the open interval P=(0,2) why is f(P)=(0,1]? why is that 1 closed?
Because the function achieves the max value (of 1) at the point x=1 (in the interior of P).
Jul
21
awarded  Yearling
Jul
21
comment Convolving data set with gaussian profile
If you want to get numerical results out you'll need to define C and mu to get ker to be numeric. Then the convolution should work. You probably want the range of x to be centered near the mean.
Jul
19
reviewed Leave Open What is the order of faces on a D20? How can I optimize the order of faces on a D-n?
Jul
19
reviewed Close NIntegrate with a parameter in integrand and upper limit
Jul
19
reviewed No Action Needed Two discrete colors for surface with ParametricPlot3D
Jul
19
revised multiple generators for iterative construction of fractal
added 137 characters in body
Jul
19
answered multiple generators for iterative construction of fractal
Jul
16
answered Simplify system functions
Jul
15
comment Addition of all elements of two sets with each other
s1 = Array[a, 2]; s2 = Array[b, 3]; Outer[Plus, s1, s2] // Flatten
Jul
2
comment Manipulate Tutorials?
How about the help files and tutorials for Manipulate?
Jul
2
awarded  Curious
Jul
1
answered Using Mathematica to find a Derivative
Jun
26
comment Unexpected result from FullSimplify
It is not zero. {FullSimplify[Y //. {Q -> Sqrt[3/(16 A)], A -> 1}] // N, FullSimplify[Z //. {Q -> Sqrt[3/(16 A)], A -> 1}] // N} gives {3.4641, 4.5} so here is at least one value of A for which the two are not equal.
Jun
26
answered How to color separate a colored-in-pencil drawing?
Jun
25
answered Can `Array` work as `Loop`?
Jun
22
comment Calculating the recursion at the Fourier domain
In the code above you have not defined ff1 or gg1 so it is not clear what you are trying to do. Why are you loading Needs[FourierSeries]? What's wrong with FourierTransform and InverseFourierTransform? And if you are going to do it numerically, then Fourier and InverseFourier should be the correct commands.
Jun
22
comment Calculating the recursion at the Fourier domain
How is this question different from your previous - and what is wrong with those answers? mathematica.stackexchange.com/q/33790/1783