Why diagonal map is closed?
3474
3 questions about Algebraic Geometry and Zariski topology
143457
Is product of two closed sets closed?
58476
Why can a matrix whose kth power is I be diagonalized?
47653
Cantor diagonalization and fundamental theorem
25735
How to assign values to a MATLAB matrix on the diagonal?
157420
Question about Subrings and integraly closed
78300
Showing a set is closed other than giving a counterexample?
52198
Why is every selfadjoint operator closed?
97547
Is it possible to get a diagonal subset symbol?
5420
Why doesn't Cantor's diagonal argument also apply to natural numbers?
153495
Continuous function does not map closed set to closed set
60722
Why does Cantor's diagonal argument not work for rational numbers?
42494
The boundary is a closed set
140225
Linear transformation maps the first quadrant to a closed set
50151
"Closed" (square) root symbol
154640
Do Diagonal Matrices Always Commute?
108408
Example of quotient mapping that is not open