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15
Math.TechQA.Club
2026-04-14 12:19:32
2.2k
Views
What are some examples of hard theorems in category theory?
Published on
14 Apr 2026 - 12:19
#soft-question
#category-theory
#examples-counterexamples
#big-list
363
Views
Proving $a\le f(a)$ for a monotonically increasing function on a well-ordered set
Published on
14 Apr 2026 - 2:32
#functions
#elementary-set-theory
#examples-counterexamples
#ordinals
#well-orders
1.7k
Views
Examples of extremally disconnected spaces
Published on
12 Apr 2026 - 13:18
#general-topology
#operator-theory
#examples-counterexamples
#connectedness
1k
Views
Weak Hausdorff space not KC
Published on
16 Apr 2026 - 11:09
#general-topology
#compactness
#examples-counterexamples
162
Views
Is a extension of a premeasure preserves outer-measure generated by the premeasure?
Published on
13 Apr 2026 - 19:13
#real-analysis
#measure-theory
#examples-counterexamples
330
Views
If all the centralizers are finite, then does it follow that the group is finite?
Published on
16 Apr 2026 - 0:22
#abstract-algebra
#group-theory
#finite-groups
#examples-counterexamples
2.1k
Views
Analogue of the Mean value theorem for holomorphic functions
Published on
11 Apr 2026 - 20:27
#complex-analysis
#examples-counterexamples
695
Views
Is there an infinite connected topological space such that every space obtained by removing one point from it is totally disconnected?
Published on
15 Apr 2026 - 3:24
#general-topology
#examples-counterexamples
#connectedness
10.1k
Views
K topology: Examples
Published on
16 Apr 2026 - 6:25
#general-topology
#examples-counterexamples
649
Views
Counterexample to linear transformation.
Published on
09 Apr 2026 - 2:02
#abstract-algebra
#polynomials
#examples-counterexamples
307
Views
Reducing size of ODE system by using symmetries: examples, references help request.
Published on
16 Apr 2026 - 11:20
#ordinary-differential-equations
#reference-request
#lie-algebras
#examples-counterexamples
#symmetry
153
Views
Resolvable spaces
Published on
10 Apr 2026 - 13:37
#general-topology
#examples-counterexamples
71
Views
Topological space in which there are no close and compacts subsets (except for the empty set)
Published on
13 Apr 2026 - 22:19
#general-topology
#compactness
#examples-counterexamples
366
Views
non-prime maximal ideal in a complemented lattice
Published on
11 Apr 2026 - 4:53
#examples-counterexamples
#order-theory
#lattice-orders
501
Views
An example of a non first countable Fréchet-Urysohn space?
Published on
11 Apr 2026 - 0:21
#general-topology
#reference-request
#examples-counterexamples
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