>> > > Let me be more clear. I think that: > > integrate(a) and diff(a) should be deprecated/not supported > integrate(b) and diff(b) be deprecated/not supported > integrate(a+b) and diff(a+b) be deprecated/not supported > > (each of these should require a explicit variable specified) >
I agree. I think it would be terrible if diff(x) returned 1 while diff(a) returned 0 (with both a and x defined as variables), but it would also be terrible if diff(a) returned 1 (since it's an expression in just one variable, so you must mean to differentiate with that variable, right?) Feel free to ignore my opinion since I never use var() or expect to, and have not taught calculus since I left the US in 1984! John > I think this is similar to how we insist that students write the variable of > integration after the "d" in an integral. > > However, in the case of callable functions with variables specified, I > suppose it would be a nice shortcut to use the explicit intent the user > expressed when creating the function to have a default variable for > integration and differentiation. > > Jason > > > -- > To post to this group, send an email to sage-devel@googlegroups.com > To unsubscribe from this group, send an email to > sage-devel+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/sage-devel > URL: http://www.sagemath.org > -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
