Reputation
Top tag
Next privilege 250 Rep.
View close votes
Badges
6
Newest
 Caucus
Impact
~9k people reached

  • 0 posts edited
  • 0 helpful flags
  • 13 votes cast
Jun
20
comment Symbol in Linear Algebra
Google is your friend: en.wikipedia.org/wiki/Element_(mathematics)
Jun
20
comment Symbol in Linear Algebra
It is like a little "e" and means "element of", so "o with a bar" is an element of the set S. But really, you are on the wrong site... this is for users of Mathematica (the software), so your question will probably be closed as off-topic.
Jun
3
comment Steps to go from $\frac{\frac{1}{x}-y}{\frac{1}{x}+y}$to $ \frac{1-xy}{1+xy} $
Simplify[((1/x) - y)/((1/x) + y)] works
Aug
24
comment How to apply Gaussian kernel to smooth density of points on 2D (algorithmically)
For the theory of filtering, look up "convolution" which is the mathematical operation being performed by commands like GaussianFilter. Wikipedia as always is a good reference: en.wikipedia.org/wiki/Convolution
Jan
6
comment In search of an angle
Do you know the equations or slopes of the green lines?
Jan
4
comment Solving: How to find an inverse function for this function?
What do you want the inverse to be when x=0?
Jul
19
comment What really are determinants?
Here's a good place to start: en.wikipedia.org/wiki/Determinant but your question is quite off topic for this site, which is about the software Mathematica.
Jul
17
comment How to calculate the number of factorizations of a square matrix?
Have you seen this? cse.unsw.edu.au/~jingling/papers/laa.pdf
May
30
comment Reducing an integral equation to a differential one
Suppose that there were two functions f_1(x) and f_2(x) both of which have the same answer K(a-b). Take the difference between the integrals of f_1(x) and f_2(x) and this has to be zero. What does that tell you?
May
30
comment Reducing an integral equation to a differential one
Here's a hint: suppose f(x) was equal to a constant. What would the integral be?
May
15
comment Solve $(x^2 + 5)^2 - 15(x^2 + 5) + 54 = 0$
Try this: define a new variable z=x^2+5 and solve z^2-15z+54 using the quadratic formula. Then solve for x in terms of z.
May
12
comment Fractal Analysis
Perhaps the most fundamental way to compare two fractals would be by their dimension.