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| \end{matrix}</math> | | \end{matrix}</math> |
| | | | | |
− | <font face="lucida calligraphy"><u>X</u></font><br> | + | <math>\begin{matrix} |
− | {<u>''x''</u><sub>1</sub>, …, <u>''x''</u><sub>''n''</sub>}<br> | + | \underline\mathcal{X} \\ |
− | cardinality ''n''
| + | \{\underline{x}_1, \ldots, \underline{x}_n\} \\ |
| + | \mbox{cardinality}\ n \\ |
| + | \end{matrix}</math> |
| | | | | |
− | <font face="lucida calligraphy">A</font><br> | + | <math>\begin{matrix} |
− | {''a''<sub>1</sub>, …, ''a''<sub>''n''</sub>}<br> | + | \mathcal{A} \\ |
− | cardinality ''n''
| + | \{a_1, \ldots, a_n\} \\ |
| + | \mbox{cardinality}\ n \\ |
| + | \end{matrix}</math> |
| |- | | |- |
| | | | | |