Linked Questions

6
votes
2answers
596 views

Simplify — is this simplest result Mathematica can provide? [duplicate]

I have a question about Simplify: When I do a simplification the returned result is not as simple as I want. When I ask for the Norm of an complex expression, ...
4
votes
3answers
2k views

Conjugating symbolic expression [duplicate]

I am trying to conjugate a symbolic expression, and I have explicitly stated the real terms. However, I simply can't get it to work: ...
2
votes
2answers
429 views

Simplify an expression with complex numbers [duplicate]

How can I get a simplify expression of following when all a,b, .., f are real numbers? FullSimplify[Abs[(a+I b)+(c+I d)(e+I f)]^2]
0
votes
1answer
297 views

How do I declare that a variable represents a real number? [duplicate]

How do I tell Mathematica that a variable is a real number. I searched for this question here and in Google and nothing that was suggested seems to work for me. I must be missing something. My code is ...
1
vote
1answer
74 views

Trouble getting Mathematica to assume some parameters are real and simplify the expression [duplicate]

Say I enter the following code: FullSimplify[Im[r*Exp[I*theta]^2 + (s + I*t)*Exp[I*theta]], Element[theta | r | s | t, Reals]] I expect to get: ...
31
votes
1answer
28k views

Extract real part of a complex expression better than Re does

I have a complex expression with real positive variables only. Mathematica Input Style: ...
34
votes
3answers
47k views

How to tell Mathematica that certain variables are real/imaginary, integer-valued, etc

I'm trying to expedite some quantum mechanical calculations (expectation values etc.) by running them through Mathematica. When I say, for example, ...
12
votes
2answers
9k views

Remove annoying Conjugate

Here is an expression ...
7
votes
3answers
2k views

Complex conjugate

How do I complex conjugate a vector? ...
13
votes
1answer
7k views

How to assume all variables in my code are reals

I won't have any occasion to have any imaginary number in my code. If there are any, that is an error. So allowing the imaginary case simply hinders the equation manipulation and simplification. I ...
4
votes
4answers
8k views

How to take conjugate of a function?

Naïvely this is what happens and it obviously is not helpful! ...
11
votes
2answers
2k views

a problem about simplifing conjugate

the situation is as follows ...
9
votes
2answers
475 views

What is the value Re[Sqrt[1+I*2*x]]?

When I try to evaluate Re[Sqrt[z]], for some values of Mathematica fails to evaluate it. For example, Re[Sqrt[2 + I*x]]` <...
6
votes
1answer
1k views

Does the Im function work with symbolic arguments?

Does the Im function work with symbolic arguments? ...
0
votes
3answers
451 views

how to take complex conjugate of a real variable

I have a function defined as follows: g[θ_] := 1/k (Exp[-I δ0] Sin[δ0] + 3 Exp[I δ1] Sin[δ1 Cos[θ] + 5/2 Exp[I δ2 (3 (Cos[θ])^2 - 1)) and I compute ...

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