Rational Field3

Each field of characteristic zero contains a copy of the rational number field
Solution to Linear Algebra Hoffman & Kunze Chapter 1.2 Exercise 1.2.8 Solution: Call the additiv...
Each subfield of the field of complex numbers contains every rational number
Solution to Linear Algebra Hoffman & Kunze Chapter 1.2 Exercise 1.2.7 Solution: Every subfield o...
Decide whether a given set of rationals is a subring
Solution to Abstract Algebra by Dummit & Foote 3rd edition Chapter 7.1 Exercise 7.1.5 Decide whi...