CAS command question
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01-14-2017, 06:44 AM
Post: #90
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RE: CAS command question
(01-13-2017 10:36 PM)DrD Wrote: Where we are disagree is before the relational operation ever enters into the discussion. We have beat this issue to death, but commands, like the CAS coeff(), command, want an expression as an argument. To get an expression, *without* evaluation, (I KNOW IT GETS EVAL'd BY CAS!), from the appropriate left or right side, it must be separated from the relation, into the corresponding expression. Then, as in this example, coeff(Expr,[Var], [Integer]), and many other commands that take expressions as arguments, they are perfectly happy.??? I don't understand what you mean by relational operation or relation. There is nothing like that in the CAS : x<2 is an expression, left(x<2) is also an expression. The first one has '<' as rootnode, the second has 'left' as rootnode. |
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