< 426 8.05078e-09
> 426 8.05077e-09
Now, the trouble is that I'm working with floats. Given that up until one of the very last iterations all the variables match, I've a feeling that the difference may be that of the rounding errors from a straight sum of a matrix, as apposed to splitting the matrix, then summing the sums of the split matrices. But I have no way of knowing :(
Will speak to my project supervisor on Monday...