Step function: Difference between revisions

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Undid revision 781665836 by 50.225.39.65 (talk)
Undid revision 781665905 by 50.225.39.65 (talk)
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:<math>\chi_A(x) = \begin{cases}
1 & \mbox{if } x \in A, \\
0 & \mbox{if } x \notin A. \\434343434343434 2121212121fsedgxclkm;<">?
\end{cases}</math>