Section 3 is hard to understand. - Ak and P are defined, but not used later - Definition of P has UTk x Nu as a computation. UTk is a k x m matrix, and Nu is "t" x 1. t is not defined. - This only makes sense if t = m. But m is the number of users, and Nu is a user vector, so should have a number of elements equal to n, the number of items - Sk * VTk is described as a k x "d" matrix but d is undefined - The diagram suggests that VTk are multiplied by all the Nu, which makes more sense -- but only if Nu are multiplied by VTk, not the other way. And the diagram depicts neither of those. - Conceptually I would understand Nu x VTk, but then P is defined by an additional product with Uk
In short... what? On Thu, Jun 3, 2010 at 4:15 PM, Ted Dunning <[email protected]> wrote: > Fire away. > > On Thu, Jun 3, 2010 at 3:52 AM, Sean Owen <[email protected]> wrote: > >> Is anyone out there familiar enough with this to a) discuss this paper >> with me or b) point me to another writeup on the approach? >> >
