Tagged Questions
2
votes
0answers
54 views
Simplify yelds an incorrect expression [closed]
I was trying to simplify an expression:
DSolve[d'@t == a + b Sin@d@t, d@t, t]
Simplify[%, Abs@a < -b < 0]
and I got
...
1
vote
0answers
59 views
Problem with using Assumptions in Simplify [closed]
I want to simplify
Log[E^(2 \[Pi] I m/n)]/(2 \[Pi] I)
To obtain m/n.
I have tried
...
0
votes
1answer
85 views
Simplifying Complex Numbers that contain physical units
I am trying to evaluate the following:
Simplify[Meter Nano Re[(a + I b)/(Meter Nano)], Assumptions -> Element[{a, b}, Reals]]
However, Mathematica returns:
...
3
votes
2answers
66 views
Detecting operator Set in Assumptions
Here is a typical issue: Simplify[x + y, x = y] produces 2 True.
Is there a way to detect operator ...
20
votes
4answers
552 views
An apparently “simple” limit?
Let $c$ and $h$ be real values.
I was using Mathematica to compute the limit $(h \rightarrow \infty)$ of the following expression:
$$
\frac{\left(h^2 +c^2 h^2 + \sqrt{4 h^2+\left(h^2+c^2 ...
1
vote
1answer
100 views
Assumptions are not being applied to integral
I am trying to use assumptions to simplify an integral, but I can't seem to get the assumptions to apply themselves. Here is the code I am using:
Note the expressions in the assumption can be found ...
5
votes
2answers
251 views
Replacements/Substitutions in Mathematica
I am a new user of Mathematica and have some questions about the simplifications of calculated expressions.
I am unable to attach an image of the session, but my Mathematica commands are:
...
10
votes
1answer
278 views
Is my expression too complicated for FullSimplify or am I doing something wrong?
I have a messily defined function $v(h, w)$ with $h, w \in \mathbb{R}$ and with a removable singularity at $h=1/2$, and I am trying to prove some of its properties using Mathematica. In particular I ...
7
votes
1answer
437 views
Assumptions on unknown functions
I'm trying to do analytic calculations in a quantum mechanic harmonic oscillator basis. Specifically I want to be able to evaluate functions of the many particle density.
I define the following ...
6
votes
4answers
224 views
Attaching persistent assumptions to symbol definition
Is it possible to attach assumptions to a symbol? This relates to this question. Most of my work involves physical equations, i.e. there are basic assumptions on variables that will always hold true ...
4
votes
1answer
364 views
Does the Im function work with symbolic arguments?
Does the Im function work with symbolic arguments?
...
15
votes
2answers
444 views
Why doesn't FullSimplify drop the Re function from an expression known to be real?
For some reason Mathematica does not properly simplify this expression:
...
9
votes
2answers
1k views
How to specify assumptions before evaluation?
If I request mathematica evaluate an integral for me, I'll often get a more general ConditionalExpression than I want. Example :
...
