Hi all, I was recently introduced to sage. I have looked a bit at reduce-sage interface. I have started with your William's reduce.py and my current version is available at
http://www-troja.fjfi.cvut.cz/~liska/asdfgh/sage/reduce.py I hope it is able to do basic interface. I have seen few notes on reduce-sage interface in sage discussion groups and hope that there is still interest as reduce is free now. I have several points/questions: 1) would be good if someone could look at the interface, try it and let me know what else should be added to the interface; I know that help is missing as there is no terminal help system in reduce 2) how to make reduce directly available without sage: import sage.interfaces.reduce as r ? how to make it available in web browser notebook? 3) in the following: ============================================================ sage: a3 = r.reduce('(x+y)**2'); a3 x**2 + 2*x*y + y**2 sage: b3 = a3._sage_() sage: type(b3) <type 'sage.symbolic.expression.Expression'> sage: diff(b3,x) 2*x + 2*y sage: diff(b3,y) --------------------------------------------------------------------------- NameError Traceback (most recent call last) /mnt/pl/usr2/home/v1/liska/tmp/sage/<ipython console> in <module>() NameError: name 'y' is not defined sage: var('y') y sage: diff(b3,y) 2*x + 2*y ================================================================= y cannot be used as sage variable, before it is declared by var. Is this a feature of sage (it works the same way with maxima) or should _sage_() function declare y as variable? 4) I understand that not everything is done completely consistently, it is just zero-th version of the interface. I should add that I am completely new to both sage and python. On the other hand I do know reduce quite well, in fact, years ago I wrote 2 of its packages. I just noticed that I am still using sage 4.2.1 while sage 4.3 is already available, hope it should work in 4.3 too. When you reply to this post please cc: me to li...@siduri.fjfi.cvut.cz Regards --Richard
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