CAS command question

[DrD]

(01-07-2017 08:15 PM)parisse Wrote:  I'm not sure you realize that, but what you ask is a little bit like asking + to work in RPN mode like in algebraic mode, after all writing 2+3 is more intuitive than << 2 3 + >> or '2+3' EVAL. Evaluation is at the heart of how a CAS work, you can not change that. Matlab is not a CAS, you can't compare. Maple is a CAS and looking at Han's explanations it does (almost) the same as Giac. Maxima is also a CAS but it does not really handle inequations, for example you can't solve(y^2>2,y), therefore it's easier for Maxima to keep > >= < <= inert.

wxMaxima:

(%i2) s: 4*x+3*y<=48$

(%i3) lhs(s);
(%o3) 3*y+4*x

(%i4) rhs(s);
(%o4) 48

Caveman simplicity ... It's not about solve, or rpn, or anything other than left() returning the left argument, right() returning the right argument. The lhs() and rhs() are missing prime commands; left() and right() CAS commands lack functionality.

( quod erat demonstrandum )