3 Jun
2003
3 Jun
'03
9:21 a.m.
Marc Olschok wrote:
For the above reason \circ is used for the "horizontal composition"; \cdot or \ast (I do not remember which one) is used for the "vertical composition", which after all looks more "point-wise".
Unfortunately some authors use these symbols just the other way round.
Marc
It is also possible to use a 2-dimensional syntax, in which horizontal composition is composed horizontally and vertical composition is composed vertically. Then algebraic manipulations are a bit like sliding tiles around in a tray. Steve Vickers.