Foldness of Bipolar Fuzzy Sets and Its Application in BCK/BCI...
In particular, the t i -cut of ( W , ℓ ) is an ideal of W for all t i ∈ [ 0 , 1 ] . The following example shows that there exists { ( t i − , t i + ) } i = 1 k ∈ ( [ − 1 , 0 ] × [ 0 , 1 ] ) k such that, if ( W , ℓ ) is a k-...