The various papers on forecast reconcilation written over the last 13 years have not used a consistent notation. We have revised our notation as we have slowly come to understand the problem better. This is common in a new area, but it makes it tricky to read the literature as you need to figure out how the notation of each paper maps to what you’ve already read.
Recently I spent a few weeks visiting Professor Tommaso Di Fonzo at the University of Padova (Italy), and one of the …