I want to use undefined functions in expressions to be simplified. For example.
I want mathematica to simplify this input
$(f^{\prime\prime}(t),g^{\prime\prime}(t))\cdot (-g^\prime(t),f^\prime(t)) $
into this output:
$f'(t)g''(t)- f''(t)g'(t)$.
How does one go about the "Simplify" command for that first expression in order to get the second one? How do you specify that $f$ is a function of $t$, without of course defining it, in an expression?
Cheers
Dot
. $\endgroup$ – b.gates.you.know.what Apr 20 '13 at 19:32