Which are Bases?
Algebra
Level
4
Which of the following are "bases" in the way described?
- \((2,\,3)\) and \((-1,\,1)\) generate \(\mathbb{R}^2\) over the real numbers.
- \(\dots,\,2^{-2},\,2^{-1},\,2^0,\,2^1,\,2^2,\,\dots\) generate real numbers by using their binary representation over \(\mathbb{F}_2\).
- \(1\) and \(\sqrt{2}\) generate the algebraic numbers over the rationals.
by
Henry Maltby