Question

What are three examples of non-sets?

Answer 1

Answer:

• These include:
• The class of all groups.
• The class of all rings.
• The class of all fields.
• The class of all vector spaces over some fixed field.
• The class of all metric spaces.
• The class of all topological spaces.
• The class of all topological groups.
• The class of all partially ordered sets.

Answer 2

Step-by-step explanation:

• The class of all groups.
• The class of all rings.

• The class of all fields.

• The class of all vector spaces over some fixed field
• The class of all metric spaces.

• The class of all topological spaces.

• The class of all topological groups.

• The class of all partially ordered sets.