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May
9
comment How can I force the assumption that a symbol is a vector of n zeros
@m_goldberg I think that assumption is strictly true. The norm is zero iff the vector is zero. But Refine simply doesn't use the norm.
May
7
comment Fundamental question about capabilities of Mathematica to represent abstract mathematics
Have you looked at the documentation for Resolve and Reduce? You can certainly derive other statements from given expressions. So the answer to question 2. seems to be yes, and that makes the other points of the question moot. But as to your first points, you'll have to do some work to bring your statements into the form of Mathematica expressions. It would certainly be appropriate as a question, but I think you would need to show some example of what you have already tried to make this question less ambiguous. As is, it's not easy to parse by a human, let alone a program.
May
7
revised Embed Code Into Image
typo
May
7
revised Embed Code Into Image
Updated code for version 10.1 to account for a bug fix in SVG export.
May
6
comment FullSimplify wrongly reduces expression to zero
In version 8, the first line with FullSimplify stays unevaluated, so the result is the same as for Simplify.
May
6
awarded  Nice Answer
May
6
reviewed Close Quantile-quantile plot
May
6
reviewed Close What particular situation do we have to use RuleDelayed after replacement?
May
6
reviewed Close Why does DSolve not give the expected analytical solution for a system of DAE?
May
5
comment Animated Wave propagation using split operator method
As I said, it's an arbitrary choice, you can change it to whatever you need. There's nothing more to it.
May
5
comment Animated Wave propagation using split operator method
You can put in any parameters you like. It depends on the physical constants of your problem, such as Fermi velocity etc. But choosing the numerical values of the constants in the equation is not a Mathematica issue.
May
5
comment Solving a vector equation
@Guesswhoitis. That's what I did in the answer of which this is a duplicate...
May
5
awarded  linear-algebra
May
5
revised General function for the expansion of a polynomial of operators
Usage added
May
5
revised General function for the expansion of a polynomial of operators
Added explanations.
May
5
revised General function for the expansion of a polynomial of operators
Added explanations.
May
5
revised General function for the expansion of a polynomial of operators
Forgot to add zeroth order term
May
4
comment Animated Wave propagation using split operator method
Yes, you're right - that was intentional. Such prefactors aren't important in linear differential equations, but of course they do affect your normalization integral. Since the question asked for a plot, I left out the prefactor because it doesn't affect the displayed shape.
May
4
comment Animated Wave propagation using split operator method
You can't make a plot of that because there are no more variables to vary when you integrate. Also, the integration has to be within the NDSolve domain.
May
4
revised General function for the expansion of a polynomial of operators
added explanation