Union
$$A \cup B =$$
{ Decision Theory, Logic, Mathematics, Statistics, Systems Theory, Theoretical Computer-Science, anger, avarice, envy, gluttony, lust, pride, sadness }
Symmetric Difference
$$A \ominus B =$$
{ Decision Theory, Logic, Mathematics, Statistics, Systems Theory, Theoretical Computer-Science, anger, avarice, envy, gluttony, lust, pride, sadness }
Cartesian Product
$$A \times B =$$
{ (anger, Decision Theory),
(anger, Logic),
(anger, Mathematics),
(anger, Statistics),
(anger, Systems Theory),
(anger, Theoretical Computer-Science),
(avarice, Decision Theory),
(avarice, Logic),
(avarice, Mathematics),
(avarice, Statistics),
(avarice, Systems Theory),
(avarice, Theoretical Computer-Science),
(envy, Decision Theory),
(envy, Logic),
(envy, Mathematics),
(envy, Statistics),
(envy, Systems Theory),
(envy, Theoretical Computer-Science),
(gluttony, Decision Theory),
(gluttony, Logic),
(gluttony, Mathematics),
(gluttony, Statistics),
(gluttony, Systems Theory),
(gluttony, Theoretical Computer-Science),
(lust, Decision Theory),
(lust, Logic),
(lust, Mathematics),
(lust, Statistics),
(lust, Systems Theory),
(lust, Theoretical Computer-Science),
(pride, Decision Theory),
(pride, Logic),
(pride, Mathematics),
(pride, Statistics),
(pride, Systems Theory),
(pride, Theoretical Computer-Science),
(sadness, Decision Theory),
(sadness, Logic),
(sadness, Mathematics),
(sadness, Statistics),
(sadness, Systems Theory),
(sadness, Theoretical Computer-Science) }
Branches of science