NewRPL: Complex Numbers in Cartesian Form r[x,y] , ...

[Han]

This is only tangentially related to the topic, but may I recommend that if you intend to insert pictures that they are resized so that users may click on them if they want to view a larger version? Or perhaps even better just supply the link. A large number of your posts are extremely difficult to read due to these large pictures being inserted throughout your text.