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Consistency in blank cells |
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:<math>f(A,B,C,D) =\sum m(4,8,10,11,12,15) + d(9,14). \,</math>
This expression says that the output function f will be 1 for the minterms <math>4,8,10,11,12</math> and <math>15</math> (denoted by the 'm' term) and that we don't care about the output for <math>9</math> and <math>14</math> combinations (denoted by the 'd' term). The summation symbol <math>\sum</math> denotes the logical sum (logical OR, or disjunction) of all the terms being summed over.
===Step 1: finding prime implicants===
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