Rational Square Root of Integer is Integer
From ProofWiki
Theorem
Let $n$ be an integer.
Suppose that $\sqrt n$ is a rational number.
Then $\sqrt n$ is an integer.
Proof
You can help Proof Wiki by expanding it.
To discuss it in more detail, feel free to use the talk page.
When this page/section has been completed, {{Stub}} should be removed from the code.
If you would welcome a second opinion as to whether your work is correct, add a call to {{Proofread}} the page (see the proofread template for usage).
Sources
- Thomas A. Whitelaw: An Introduction to Abstract Algebra (1978)... (previous)... (next): Exercise $2.14$
