Verifying validity of proof that E' is closed
33310
Proving that the set of limit points of a set is closed
10477
Finding the closure of A=$\mathbb Q \cap [0,1]$.
116009
Proving that if a set is both open and closed then it is equal to the real numbers
143942
Verify proof that sequence converges
88603
verify equicontinuous functions
46698
Showing a set is closed under inverses
24050
Characterization of the Closure of a Set
64502
On the meaning of being algebraically closed
52545
Prove limit converges in definition of $e.$
90599
Trouble with proving $A$ is an integrally closed domain $\Rightarrow$ $A[t]$ is integrally closed domain
14784
Inductive proof of the closed formula for the Fibonacci sequence
57215
Stuck on formal proofs. Not sure how to continue
141260
Prove using the formal definition of a limit that
52629
Example 1, Sec. 22 in Munkres' TOPOLOGY, 2nd edition: How to verify that this map is closed?
32950
Fake induction proofs
158569
Proving a particular subset of $R^n$ is closed
95415
proof relating to limit definition of e