1. It is a matter of finding out, differencing worthiness and irrelevance, connectedness and distantness, warmth and Aloofness, brightness and dimness

2. The common integration line (63) is connected to a set of analog comparison circuits (62) to form an analog vector absolute differencing circuit row.

3. The upwind schemes attempt to discretize hyperbolic partial differential equations by using differencing biased in the direction determined by the sign of the characteristic speeds.