| Line 652: |
Line 652: |
| | \\[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] |
| | & + & | | & + & |