Union
$$A \cup B =$$
{ avoidant, collaborative, competitive, dependent, forming, independent, norming, participative, performing, storming }
Symmetric Difference
$$A \ominus B =$$
{ avoidant, collaborative, competitive, dependent, forming, independent, norming, participative, performing, storming }
Difference
$$A - B =$$
{ avoidant, collaborative, competitive, dependent, independent, participative }
Cartesian Product
$$A \times B =$$
{ (avoidant, forming),
(avoidant, norming),
(avoidant, performing),
(avoidant, storming),
(collaborative, forming),
(collaborative, norming),
(collaborative, performing),
(collaborative, storming),
(competitive, forming),
(competitive, norming),
(competitive, performing),
(competitive, storming),
(dependent, forming),
(dependent, norming),
(dependent, performing),
(dependent, storming),
(independent, forming),
(independent, norming),
(independent, performing),
(independent, storming),
(participative, forming),
(participative, norming),
(participative, performing),
(participative, storming) }