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| | |} | | |} |
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| − | {| align="center" cellpadding="10" width="90%" | + | {| align="center" cellpadding="10" |
| − | | align="center" |
| + | | |
| − | <pre> | + | <math>\begin{array}{rcccccc} |
| − | o---------------------------------------o
| + | f |
| − | | |
| + | & = & x & \cdot & y |
| − | | f = x y |
| + | \\[4pt] |
| − | | |
| + | \operatorname{E}f |
| − | | Ef = x y · (dx)(dy) |
| + | & = & x & \cdot & y & \cdot & (\operatorname{d}x)(\operatorname{d}y) |
| − | | |
| + | \\[4pt] |
| − | | + x (y) · (dx) dy |
| + | & + & x & \cdot & (y) & \cdot & (\operatorname{d}x)~\operatorname{d}y~ |
| − | | |
| + | \\[4pt] |
| − | | + (x) y · dx (dy) |
| + | & + & (x) & \cdot & y & \cdot & ~\operatorname{d}x~(\operatorname{d}y) |
| − | | |
| + | \\[4pt] |
| − | | + (x)(y) · dx dy |
| + | & + & (x) & \cdot & (y) & \cdot & ~\operatorname{d}x~~\operatorname{d}y~\end{array}</math> |
| − | | |
| |
| − | o---------------------------------------o
| |
| − | </pre> | |
| | |} | | |} |
| | | | |