Re: The actual motion? Re: Motion P1788/M0012.01:InnerAdditionAndSubtraction

["Nate Hayes" <nh@xxxxxxxxxxxxxxxxx>]

R. Baker Kearfott wrote:
> I support including inner subtraction.  (Otherwise, isn't inner
> addition an instance of inner subtraction?)

Hi Baker, P1788,

Sorry for the delay. I have been away on business.

Inner addition and subtraction are related algebraically by the factor -1, 
i.e., for any aa, bb \in IR:

   aa innerSub bb = aa innerAdd (-1*bb).

Even more generally, the two operations for addition, i.e., normal addition 
and inner addition, can be considered as one operation in two modes as 
described on p. 5.

Also, every element aa \in IR has unique inverse with respect to inner 
addition operator, and this is the element -1*aa, e.g.,

   [1,2] innerAdd [-2,-1] = [0,0].

Nate