What is a switching equation? (Boolean Expression ⁄ Function)

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Hello,

I know a Boolean function is described by an Boolean expression. Would it be correct to say a switching equation is the something as a Boolean function?

Example:

f(A,B,C) = A+BC'+ABC
^Boolean function ^Boolean expression

Is this whole thing called a switching equation? If not can you give me a very simple and clear explanation.

Thanks!