Linked Questions

6 votes
2 answers
642 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, ...
an offer can't refuse's user avatar
4 votes
3 answers
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: ...
BillyJean's user avatar
  • 1,273
2 votes
2 answers
1k 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]
Frey's user avatar
  • 325
0 votes
1 answer
353 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 ...
Soldalma's user avatar
  • 1,289
1 vote
1 answer
100 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: ...
Nathaniel Bottman's user avatar
56 votes
3 answers
120k 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, ...
Matthew Brunetti's user avatar
39 votes
1 answer
41k 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: ...
max's user avatar
  • 1,585
22 votes
2 answers
17k 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 ...
user42459's user avatar
  • 345
15 votes
2 answers
13k views

Remove annoying Conjugate

Here is an expression ...
matheorem's user avatar
  • 17.1k
7 votes
3 answers
3k views

Complex conjugate

How do I complex conjugate a vector? ...
Raksha's user avatar
  • 633
5 votes
4 answers
13k views

How to take conjugate of a function?

Naïvely this is what happens and it obviously is not helpful! ...
user6818's user avatar
  • 1,191
13 votes
2 answers
2k views

a problem about simplifing conjugate

the situation is as follows ...
matheorem's user avatar
  • 17.1k
9 votes
2 answers
664 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]]` <...
user132682's user avatar
6 votes
1 answer
1k views

Does the Im function work with symbolic arguments?

Does the Im function work with symbolic arguments? ...
Gary's user avatar
  • 569
1 vote
3 answers
2k 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 ...
Logan's user avatar
  • 517

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