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visits member for 2 years, 6 months
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A duck walks into a bar. Animal control is promptly called and the duck is released into a near by park.


Jul
2
awarded  Curious
Jan
20
awarded  Popular Question
Jan
17
awarded  Yearling
Jun
6
asked Scripting a visual comparison between the derivative and some finite scheme
Apr
17
comment Solve Differential equation system
@JensJensen: I don't know what you're saying. You read off the matrix $A$ from the differential equation. You exponentiate it. You multiply the resulting matrix $\text{e}^{A t}$ with the initial vector. Now matter what the matrix or the differential equations are, this works. If the vector is $\vec 0$, then the vector will stay this $\vec 0$ no matter what the matrix is. If the matrix is four $0'$s, then $\text{e}^{A t}=E$, where $E$ is the unit matrix. No evolution as the differential equation given via $A$ is trivial. For any "What if" question like that, you can also just ask the code here.
Apr
17
comment Solve Differential equation system
@JensJensen: "You can't multiply Matrix A with to vectors of 0." I'm not sure what you're saying, but if you say you can't use it for initial values $(0,0)$, then you're not right. Of course you can: $\text{e}^{At}\vec 0=\vec 0$. And this is exactly the solution of the differential equation: E.g $\dot x_1(0)=x_1(0)-x_2(0)=0$, then it says that the value starts at $x_1(0)=0$ and doesn't change.
Apr
13
revised Solve Differential equation system
added 253 characters in body
Apr
13
answered Solve Differential equation system
Feb
6
comment Highlighting bracketing in Mathematica
@jVincent: The information is chemical data (the version of the code in that question is not up to date). I e.g. print it in some sort of TeX-Form. Don't know how to reduce the boxes to a more pleasurable form atm.
Feb
6
comment Highlighting bracketing in Mathematica
@Szabolcs: Interesting reference, although I was not thinking of a function like TraditionalForm, but I want to have the input data displayed differently when I type it in. I'll never evaluate the data as such, I convert the "information" to something differen, see next post.
Feb
6
revised Highlighting bracketing in Mathematica
added 115 characters in body
Feb
6
asked Highlighting bracketing in Mathematica
Jan
17
awarded  Yearling
Dec
23
awarded  Nice Answer
Nov
26
revised Generating a function which outputs possible chemical reactions
added 4086 characters in body
Nov
23
accepted Generating pairs of additive and multiplicative factors for integers
Nov
23
comment Generating pairs of additive and multiplicative factors for integers
cool, can it also produce the flipped sets, e.g. $\{2,10\}$?
Nov
23
asked Generating pairs of additive and multiplicative factors for integers
Nov
19
comment Generating a function which outputs possible chemical reactions
@jVincent: Yeah, okay, makes sense. The function which generates reaction is really the big part. I wanted to start doing this as a Java object, when I decided that all the list generation would maybe be better suited for Mathematica, this is why it looks like that (something which returns output for k=1,2,3) in my brain atm.
Nov
19
accepted How to partition a disk into individually spaced bricks?