[Maxima] It seems MAXIMA is not of the same type with Mathematica and Maple

[wang yin]

Hi,

  I've used Mathematica and Maple for sometime, but now I'm trying MAXIMA.
  I find that MAXIMA has a far more powerful language and logic than Mathematica.
  I find many many abstract comcepts in the 3rd section of the manual. I haven't met the functions mentioned here in Mathematica though I read a lot of Mathematica book.
  I even think MAXIMA is not of the same type of software as Mathematica!
  Am I wrong? Please tell me.

-- 
Wang Yin
DA Lab, Tsinghua University,
100084
Beijing China