@tomleslie 

thanks for the quick reply!

@Preben Alsholm 

ahh yeah, i didn't realise. thanks :)

@acer 

thanks for the reply. however the x = x part of your expression doesn't point to a previous list does it?

i want to be able to define a list of arbitrary numbers (floats to be exact) and calculate the sum of x*ln(x) for each x in the list

@Markiyan Hirnyk 

i have yet another question i hope you can help me with.

Yesterday i ended up using your command:

implicitplot(max(2-r, r-5, 3*Pi*(1/4)-theta, theta-5*Pi*(1/4)) <= 0, r = 0 .. 6, theta = 0 .. 2*Pi, coords = polar, axiscoordinates = polar, gridrefine = 3);

but how do i input a radius that is just r≥0 ?

can i just remove the "2-r, r-5," from the code above? because im not sure if maple is giving me the right output

@Markiyan Hirnyk 

Thanks a bunch :D

Thanks a lot :D it works perfectly

Thanks a lot :D it works perfectly