limit of a function which is defined for rational and irrational points on real line explicitly
89814
Limit of a Piecewise Function defined on Rationals and Irrationals
79490
Proving the set of points at which a function diverges to $\infty$ is countable
142000
Prove that there is an irrational number and a rational number between any two distinct real numbers
54893
$ \lim\limits_{x \rightarrow \ + \infty}(\sqrt{x^2 + 2x} - \sqrt{x^2 - 7x})$
30834
limit of $\lim\limits_{x \to \infty}((x+1)^a - x^a)$
5478
Limit of $\lim_{(x,y)\rightarrow(0,0)}\frac{x^2y^2}{x^3+y^3}$
149601
$\lim_{x\to{\infty}} (x-\sqrt{x^2+x})$
30411
The closure of the irrational numbers on $\mathbb{R}$
86988
Cardinality of the Irrationals
2882
Limit points of the set $\{\frac {\varphi(n) }n : n\in \mathbb{N}\}$
49769
A function for which one-sided limits are zero and infinity
31146
Does the limit $\lim_{(x,y)\to (0,0)} \frac {x^3y^2}{x^4+y^6}$ exist
18222
Set of continuity points of a real function
36983
Does there exist a continuous function such that f(x) is rational for every irrational x, and f(x) is irrational for every rational x?
113122
Prove that a continuous real function with finite limits is bounded
15110
About irrational logarithms
36248
A classical problem about limit of continuous function at infinity and its connection with Baire Category Theorem