Re: [EXTERNAL] Re: 1-button calculator ~ "all elementary fns from a single operator"

On Fri, May 01 2026, Henry Baker <[email protected]> wrote:

> Obviously, Google was confused.

No, it was not. The OP just needed to do some re-arranging.

(%i3) eq : 'diff(y,x) = y*exp(x);

(%o3) 'diff(y,x,1) = %e^x*y
(%i4) ode2(eq,y,x);

(%o4) y = %e^%e^x*%c
(%i5) map(log,%);

(%o5) log(y) = log(%e^%e^x*%c)
(%i6) %,logexpand=all;

(%o6) log(y) = log(%c)+%e^x
(%i7) subst(first(rhs(%))=eml(y,x),%-exp(x));

(%o7) log(y)-%e^x = eml(y,x)

Leo