# Tagged Questions

1answer
790 views

### Does the Im function work with symbolic arguments?

Does the Im function work with symbolic arguments? ...
1answer
561 views

### Can I check if an expression is positive using assumptions?

I have the following notebook: ...
1answer
237 views

### Can't simplify Abs[a*Cos[x]]^2

Why doesn't FullSimplify[ Abs[a*Cos[x]]^2, Assumptions -> {{a, x} ∈ Reals}] simplify to (a*Cos[x])^2 but this query <...
1answer
224 views

### Simplifying conditional expressions using assumptions does not work

I have a conditional expression f[x_] := x /; x ∈ Reals This works fine for normal numbers and symbols, e.g. ...
1answer
261 views

### Assumptions seem not to be considered

In the following a,b is a probability distribution, i.e. a+b==1 with ...
1answer
43 views

### Simplify With Assumptions Not Using Distributive Property Of Dot Product

Given the following expression Assuming[(n | d | t) ∈ Vectors[3, Reals] && n.t == 0, FullSimplify[(n + d).t]] Why does mathematica give me the below ...
2answers
220 views

### Assumptions with patterns

I want that Mathematica assumes every symbol like Subscript[s,i] to be evaluate as a real and positive number. I have tried ...
1answer
146 views

### Mathematica does not help in this integral

I am trying to solve this integral with assumptions: ...