Union
$$A \cup B =$$
{ angry, bored, consciousness, feeling, happy, material, mental, peaceful, perception }
Symmetric Difference
$$A \ominus B =$$
{ angry, bored, consciousness, feeling, happy, material, mental, peaceful, perception }
Difference
$$A - B =$$
{ angry, bored, happy, peaceful }
Difference
$$B - A =$$
{ consciousness, feeling, material, mental, perception }
Cartesian Product
$$A \times B =$$
{ (angry, consciousness),
(angry, feeling),
(angry, material),
(angry, mental),
(angry, perception),
(bored, consciousness),
(bored, feeling),
(bored, material),
(bored, mental),
(bored, perception),
(happy, consciousness),
(happy, feeling),
(happy, material),
(happy, mental),
(happy, perception),
(peaceful, consciousness),
(peaceful, feeling),
(peaceful, material),
(peaceful, mental),
(peaceful, perception) }
Contrasting and categorization of emotions