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15
Math.TechQA.Club
2026-04-15 14:46:18
192
Views
Show that $\sup \{ \frac{|Tv|}{|v|}: v \neq 0 \} \leq \sup\{ |Tv|: |v|<1 \}.$
Published on
15 Apr 2026 - 14:46
#real-analysis
#definition
#normed-spaces
450
Views
Show that the norm and conorm of $T$ are the radii of the smallest ball that contains $TU$ and the largest ball contained in $TU.$
Published on
14 Apr 2026 - 12:39
#real-analysis
#definition
#normed-spaces
326
Views
Why fundamental theorem of algebra is stated less intuitively in college math?
Published on
10 Apr 2026 - 17:43
#algebra-precalculus
#polynomials
#complex-numbers
#soft-question
#definition
33
Views
What is the norm of elements of $k_b^*$?
Published on
12 Apr 2026 - 10:00
#number-theory
#elementary-number-theory
#algebraic-number-theory
#definition
202
Views
About the Darboux Integral Definition
Published on
09 Apr 2026 - 2:44
#calculus
#real-analysis
#integration
#definition
56
Views
What does it "mean" for two orthogonal vases of a vector space to be continguous?
Published on
15 Apr 2026 - 6:55
#linear-algebra
#number-theory
#definition
#quadratic-forms
83
Views
Question on substitution of variable in limit definition
Published on
09 Apr 2026 - 16:33
#real-analysis
#limits
#definition
#epsilon-delta
200
Views
What does "$g$ and $-g^{-1}$ are homologous" mean?
Published on
13 Apr 2026 - 11:55
#algebraic-topology
#notation
#definition
2.5k
Views
What is meant by square free polynomial?
Published on
11 Apr 2026 - 12:29
#polynomials
#definition
200
Views
Another concept of centrality
Published on
14 Apr 2026 - 10:43
#graph-theory
#reference-request
#definition
1.2k
Views
Defining the quotient map
Published on
14 Apr 2026 - 7:20
#general-topology
#definition
55
Views
Numbers which cannot be computed by the sum of the squares of their preceding numbers - Name?
Published on
16 Apr 2026 - 7:14
#number-theory
#elementary-number-theory
#definition
81
Views
Morphisms in the category $\text{Comp}$ are abelian groups?
Published on
16 Apr 2026 - 5:07
#algebraic-topology
#notation
#category-theory
#definition
178
Views
Debate on definition of Critical point and local / absolute extremas
Published on
09 Apr 2026 - 13:36
#multivariable-calculus
#proof-verification
#definition
#proof-explanation
#stationary-point
2k
Views
How is division symbol usage currently defined?
Published on
14 Apr 2026 - 13:09
#definition
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