Proposition: Indicator Function and Set Operations

Let $S$ be a set, $A,B\subseteq S$ be subsets with the indicator functions $\chi_A$ and $\chi_B.$ Then the equations hold:

Proofs: 1


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References

Bibliography

  1. Flachsmeyer, J├╝rgen: "Kombinatorik", VEB Deutscher Verlag der Wissenschaften, 1972, 3rd Edition