I'm just learning digital electronics, taking an introductory class. Everything is pretty clear so far, except the concept of a "dual" of a logical function has me slightly puzzled.
I think it's like this: If I take any true logical equation, and reverse the operators, and interchange 1s and 0s, (and, do NOT switch A to A' or vice-versa), the equation I get as a result is still true, and is the dual of the original -- but the new equation is NOT the equivalent of the orginal. Is that right?
For example:
A + A' = 1 AA' = 0
Or another example:
A + 1 = 1 A0 = 0
Or, once more:
A + 0 = A A1 = A
Are each of these pairs, in fact, the dual of each other? Thanks in advance for all replies.
Steve O.
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