Union
$$A \cup B =$$
{ Clarifying Objectives, Determining Characteristics, Establishing Functions, Evaluating Alternatives, Generating Alternatives, Identifying Opportunities, Improving Details, Setting Requirements, aries, cancer, capricorn, libra }
Symmetric Difference
$$A \ominus B =$$
{ Clarifying Objectives, Determining Characteristics, Establishing Functions, Evaluating Alternatives, Generating Alternatives, Identifying Opportunities, Improving Details, Setting Requirements, aries, cancer, capricorn, libra }
Difference
$$A - B =$$
{ Clarifying Objectives, Determining Characteristics, Establishing Functions, Evaluating Alternatives, Generating Alternatives, Identifying Opportunities, Improving Details, Setting Requirements }
Cartesian Product
$$A \times B =$$
{ (Clarifying Objectives, aries),
(Clarifying Objectives, cancer),
(Clarifying Objectives, capricorn),
(Clarifying Objectives, libra),
(Determining Characteristics, aries),
(Determining Characteristics, cancer),
(Determining Characteristics, capricorn),
(Determining Characteristics, libra),
(Establishing Functions, aries),
(Establishing Functions, cancer),
(Establishing Functions, capricorn),
(Establishing Functions, libra),
(Evaluating Alternatives, aries),
(Evaluating Alternatives, cancer),
(Evaluating Alternatives, capricorn),
(Evaluating Alternatives, libra),
(Generating Alternatives, aries),
(Generating Alternatives, cancer),
(Generating Alternatives, capricorn),
(Generating Alternatives, libra),
(Identifying Opportunities, aries),
(Identifying Opportunities, cancer),
(Identifying Opportunities, capricorn),
(Identifying Opportunities, libra),
(Improving Details, aries),
(Improving Details, cancer),
(Improving Details, capricorn),
(Improving Details, libra),
(Setting Requirements, aries),
(Setting Requirements, cancer),
(Setting Requirements, capricorn),
(Setting Requirements, libra) }
Design methods