Construct a set $A$ for which the lower box dimension of $A$ is less than the upper box dimension of $A$
35206
Minkowski Dimension of Special Cantor Set
144731
Disjoint closed sets in a second countable zero-dimensional space can be separated by a clopen set
156479
Fractal dimension of set in $\mathbb{R}^2$
154038
A constructive lower bound on Ramsey numbers
75829
Dimension of open subsets of $R^n$
35644
Find the supremum of the following set
132025
Is there an alternative to Cantor's cardinalities that makes proper subsets smaller than their sets?
103307
Generate the smallest $\sigma$-algebra containing a given family of sets
42358
Find a Borel subset satisfying the condition
35043
Cardinality of a set A is strictly less than the cardinality of the power set of A
27889
If the set of odd numbers is a subset of $\mathbb N$ then surely it is smaller than $\mathbb N$
3896
A closed set in $(A, \mathcal T_A)$ that is not closed in $(X, \mathcal T)$
142583
Subsets of the Cantor set
28391
Prove the compactness of a set B
74498
Smallest dense subset of $\mathbb{R}$
146664
The union of two linearly independent subsets
41611
Open and closed set in n by n matrices space.