rational function cancellation
117816
Is $\frac{x^2+x}{x+1}$ a polynomial?
84374
Rational function with absolute value $1$ on unit circle
44148
Functions that are their own inverse.
14830
A transformation of F[x]
3801
Functions that take rationals to rationals
83913
Rational solutions of Pell's equation
1060
Minimal polynomial of intermediate extensions under Galois extensions.
87735
Prove that the roots $\in \Bbb R$ of $x^3+x+1=0$ aren't rational without RRT
150274
Inverse of a function - $f^-(x)$ in a restricted domain
1117
Is there a bijection between $(0,1)$ and $\mathbb{R}$ that preserves rationality?
141273
When is $\sin(x)$ rational?
23112
Solving an equation with rational expressions (step by step)
21922
Elegant way of obtaining the envelope of oscillating function
73079
Eliminating non-integer solutions to $ab / (2\sqrt{ab} + a + b)$
38886
Discontinuous function on Q
107772
Separability of functions with compact support
151439
$\sqrt{1-x^2}$ is not a rational function