Help ly needed in Mathematica Simplify

[Neitrino]

Help urgently needed in Mathematica Simplify

Dear All,

I have a very longe expression (see file attached ) of variables x, a, Lambda... etc,
when I apply "Simplify" I am left only with very short expression
ONLY with variable Lambda.

But if in the initial expression I declare "a" variable as equal to one (a = 1) and afterwrds try to do simplification it gives me ZERO!.

So why this happen .. If the first "Simplify" tells me that the expression is dependent only on Lambda why "a" variable affects the result ...?

Pls heelp... what I do wrong...
George

 

[Hepth]

I assume there's some zeroes. The first answer is correct, as you can see if you do :
Limit[fx[a],a->1]
its the a independent solution. The second part (where it is 0) is most likely due to these divide by zeroes, where mathematica cannot correctly simplify it.

 

[oswaler]

Dear George,

Thank you for reaching out for help with Mathematica Simplify. It is possible that the initial expression you are working with is too complex for Simplify to handle efficiently. In such cases, it might be helpful to try using other functions such as FullSimplify or Expand to see if they can simplify the expression further.

Alternatively, you can try using assumptions in Simplify to specify certain variables or parameters as constants. For example, you can try using the assumption "a \[Element] Reals" to treat a as a real number and see if that helps with the simplification.

If you are still having trouble, it would be helpful if you could provide a sample of your initial expression and the specific steps you are taking to simplify it, so that we can better understand the issue and provide targeted advice.

I hope this helps and please let me know if you have any further questions or concerns.

Best,