What is the cardinality of $M_2(\mathbb{R})$, i.e the set of all 2 by 2 real matrices( $|M_2(\mathbb{R})|$)?
2026-03-28 01:35:26.1774661726
What is the cardinality of $M_2(\mathbb{R})$
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The cardinality of $M_2(\mathbb R)$ is the same as the cardinality of $\mathbb R^4$ which is the same as the cardinality of $\mathbb R^n$ for any $n$, including $n=1$.