Simplify Exponential argument

Questions
,
1

Hi !

I try to simplify the content of an exponential argument. This exponential is drowned in a complex expression.
If I apply the simplification over the exponential only, it works.
In another hand, if the exponential is enclosed in a complex expression, it does not work anymore, it looks like Simplify[ ] function is not evaluated :

1234func.png
1234func.png666×512 6.7 KB

May I ask some hints ?

Regards

2

Please post copyable code according to this tutorial: ** How to type up a post: editor tutorial & general tips **. To edit your post - click “Edit” in the bottom right corner.

3

This does not answer the question regarding hints, but i notice that Mma 7.0.1 returned the (same) simplified expression for the exponential, in both cases.

4

Hi !

Sorry for the picture instead of code, but when copying / pasting code from my notebook, strange characters appear instead of Mathematica input code :

\!\(\*
TagBox[
FractionBox[
SuperscriptBox["E",
RowBox[{"-",
FractionBox[
RowBox[{"t", " ",
RowBox[{"(",
RowBox[{"tau", "+",
RowBox[{"r", " ", "tau"}]}], ")"}]}],
RowBox[{"2", " ", "Q", " ",
SuperscriptBox["tau", "2"]}]]}]], "p1"],
HoldForm]\)

Concerning my issue, I found the solution : in the second case to obtain the proper simplifcation, I have to apply ReleaseHold[ ] function on the expression before the Replace[ ] invocation.

Cheers!

5

It’s because the thing is wrapped in HoldForm.