1.Previous
3.Next

groups. Thus the natural numbers (N, +, 0) form a substructure of (Z, +, 0) which is not a submodel, while the even numbers (2Z, +, 0) form a submodel.

Other examples:
# The algebraic numbers form a submodel of the complex numbers in the theory of algebraically closed fields.
# The rational numbers form a submodel of the real numbers

1.Previous
3.Next