First, greetings from newbie to "staff"
Now, let's start:
Since some days I'm struggling a little bit with this paper: http://jmp.aip.org/resource/1/jmapaq/v5/i9/p1204_s1?isAuthorized=no , especially with two questions:
1) On page 1205, II, A (right column): What does \tilde v B...