On Thu, February 18, 2010 5:56 pm, Joe Collins wrote: > Dear Michael, > implies tuple concatenation is normal. > (Sorry, I didn't mean to knock you for inconsistency). [I'm not sure Michael means OM Tuples> > Let me, however, get straight to my real concern. > I want to represent a coordinate variable tuple like (X, Y, Z) or > (r, theta, phi). I do NOT consider these "vectors" in general. > I was considering using tuple to construct them, but then needed a > means of indexing them. Either adding a "tuple_selector" symbol or using > the existing list symbols seemed to be the two best options, with my > preference towards the "tuple_selector" symbol. > After this feedback on the OpenMath flavor of things, my preference has > increased in that direction. Agreed, and tuple selection does indeed appear to be missing (except that we are told that tuples can be made from pairs, and we have Pair selection). I guess by analogy it should be called 'Proj'. But I didn't write ECC. Olga - did you?
James Davenport Recently: Visiting Full Professor, University of Waterloo Now back as: Lecturer on XX10190, CM30070, CM30078/50123, CM50209 Hebron & Medlock Professor of Information Technology, University of Bath OpenMath Content Dictionary Editor and Programme Chair, OpenMath 2009 IMU Committee on Electronic Information and Communication _______________________________________________ Om mailing list [email protected] http://openmath.org/mailman/listinfo/om
