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15
Math.TechQA.Club
2026-04-12 13:07:56
1.8k
Views
Does a unique global and local minimum imply (strict) convexity?
Published on
12 Apr 2026 - 13:07
#multivariable-calculus
#convex-optimization
#examples-counterexamples
155
Views
Superadditive but not convex function
Published on
11 Apr 2026 - 1:36
#analysis
#convex-analysis
#examples-counterexamples
73
Views
Why does $\Bbb Z[{1+\sqrt{-19}\over 2}]$ contain $1$?
Published on
17 Apr 2026 - 4:59
#abstract-algebra
#ring-theory
#examples-counterexamples
96
Views
Is it true that $nx_n>(n+1)x_{n+1}$?
Published on
14 Apr 2026 - 18:08
#real-analysis
#sequences-and-series
#examples-counterexamples
109
Views
Inverse limit of closed intervals which is open?
Published on
10 May 2026 - 14:49
#category-theory
#examples-counterexamples
#real-numbers
#limits-colimits
96
Views
Analyzing the convexity of a superadditive function
Published on
14 Apr 2026 - 16:51
#analysis
#convex-analysis
#examples-counterexamples
280
Views
Non-example of a lemma on continuity
Published on
11 Apr 2026 - 9:55
#general-topology
#continuity
#examples-counterexamples
49
Views
Counterexamples between Rings and their polynomial Rings
Published on
14 Apr 2026 - 12:35
#abstract-algebra
#ring-theory
#examples-counterexamples
291
Views
A conjecture about $8n+6$
Published on
10 May 2026 - 15:44
#elementary-number-theory
#examples-counterexamples
#conjectures
66
Views
Non-degenerate Bilinear Forms and Counterexample
Published on
15 Apr 2026 - 13:17
#linear-algebra
#examples-counterexamples
174
Views
How to find examples of non-unique euclidean division in $\Bbb Z[i]$?
Published on
10 May 2026 - 12:34
#abstract-algebra
#examples-counterexamples
#euclidean-algorithm
1.2k
Views
How to explain to kid why subtraction is not commutative
Published on
10 May 2026 - 15:51
#arithmetic
#examples-counterexamples
#applications
128
Views
An example for integral by substitution where the substitution is not $C^1$
Published on
16 Apr 2026 - 16:59
#calculus
#real-analysis
#integration
#examples-counterexamples
#substitution
93
Views
continues function and uniformly convergent
Published on
10 Apr 2026 - 13:48
#calculus
#continuity
#examples-counterexamples
#uniform-convergence
4.9k
Views
What is the use of Null Space?
Published on
13 Apr 2026 - 13:35
#linear-algebra
#vector-spaces
#examples-counterexamples
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