I thought there is 1 if the letter belongs to both set, and 0 if it belongs only to the set A. In this case. letters "a" and "e" both belong to sets A and B, so shouldn't there be 1 in: "If the letter is 'a', then the value is 0."?
Anyway, I understand that, but is this the way I have to describe it? Besides, is letter "y" a vowel too, in English?
And one more thing, thanx for your help
Here is the question."Let A be the set of 26 letter of the alphabet. Desribe the characteristic function of the set of vowels."
Well the definition of characteristic function seems very simple and I tried to apply it to my question but I'm stuck. I guess I don't understand what exactly I need to do.
Could anyone help me out?