Hi, I am curious about how the Vector.express function behaves, when we call it from a Zero Vector. For example:
>>>from sympy.physics.mechanics.point import Point >>>A = Point() >>>type(A) sympy.physics.mechanics.point.Point >>>A.pos_from(A) 0 >>>type(A.pos_from(A)) sympy.physics.mechanics.essential.Vector Now When I call "express" method from this particular Zero Vector, say "I" is my sympy.physics.mechanics.essential.ReferenceFrame Now, >>> A.pos_from(A).express(I) 0 >>> type(A.pos_from(A).express(I)) sympy.core.numbers.Zero I am not sure whether it is a bug, or it should behave like this only. Shouldn't it return sympy.core.numbers.Vector instead? Thanks -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at http://groups.google.com/group/sympy. For more options, visit https://groups.google.com/groups/opt_out.
