| Line 647: | 
Line 647: | 
|   | <math>\begin{array}{rcccccc}  |   | <math>\begin{array}{rcccccc}  | 
|   | \operatorname{d}(pq)  |   | \operatorname{d}(pq)  | 
| − | & = & p & \cdot & q & \cdot &  | + | & = &  | 
|   | + | p & \cdot & q & \cdot &  | 
|   | \texttt{(} \operatorname{d}p \texttt{,} \operatorname{d}q \texttt{)}  |   | \texttt{(} \operatorname{d}p \texttt{,} \operatorname{d}q \texttt{)}  | 
|   | \\[4pt]  |   | \\[4pt]  | 
| − | & + & p & \cdot & \texttt{(} q \texttt{)} & \cdot & \operatorname{d}q  | + | & + &  | 
|   | + | p & \cdot & \texttt{(} q \texttt{)} & \cdot & \operatorname{d}q  | 
|   | \\[4pt]  |   | \\[4pt]  | 
| − | & + & \texttt{(} p \texttt{)} & \cdot & q & \cdot & \operatorname{d}p  | + | & + &  | 
|   | + | \texttt{(} p \texttt{)} & \cdot & q & \cdot & \operatorname{d}p  | 
|   | \\[4pt]  |   | \\[4pt]  | 
| − | & + & \texttt{(} p \texttt{)} & \cdot & \texttt{(}q \texttt{)} & \cdot & 0  | + | & + &  | 
|   | + | \texttt{(} p \texttt{)} & \cdot & \texttt{(}q \texttt{)} & \cdot & 0  | 
|   | \end{array}</math>  |   | \end{array}</math>  | 
|   | |}  |   | |}  | 
| Line 666: | 
Line 670: | 
|   | <math>\begin{array}{rcccccc}  |   | <math>\begin{array}{rcccccc}  | 
|   | \operatorname{r}(pq)  |   | \operatorname{r}(pq)  | 
| − | & = & p & \cdot & q & \cdot &  | + | & = &  | 
|   | + | p & \cdot & q & \cdot &  | 
|   | \operatorname{d}p ~ \operatorname{d}q  |   | \operatorname{d}p ~ \operatorname{d}q  | 
|   | \\[4pt]  |   | \\[4pt]  | 
| − | & + & p & \cdot & \texttt{(} q \texttt{)} & \cdot &  | + | & + &  | 
|   | + | p & \cdot & \texttt{(} q \texttt{)} & \cdot &  | 
|   | \operatorname{d}p ~ \operatorname{d}q  |   | \operatorname{d}p ~ \operatorname{d}q  | 
|   | \\[4pt]  |   | \\[4pt]  | 
| − | & + & \texttt{(} p \texttt{)} & \cdot & q & \cdot &  | + | & + &  | 
|   | + | \texttt{(} p \texttt{)} & \cdot & q & \cdot &  | 
|   | \operatorname{d}p ~ \operatorname{d}q  |   | \operatorname{d}p ~ \operatorname{d}q  | 
|   | \\[4pt]  |   | \\[4pt]  | 
| − | & + & \texttt{(} p \texttt{)} & \cdot & \texttt{(}q \texttt{)} & \cdot &  | + | & + &  | 
|   | + | \texttt{(} p \texttt{)} & \cdot & \texttt{(}q \texttt{)} & \cdot &  | 
|   | \operatorname{d}p ~ \operatorname{d}q  |   | \operatorname{d}p ~ \operatorname{d}q  | 
|   | \end{array}</math>  |   | \end{array}</math>  | 
|   | |}  |   | |}  |