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15
Math.TechQA.Club
2026-03-23 17:47:36
73
Views
What does it meant :$4$ and $2(1+\sqrt{5}))$ without Great commone divisor?
Published on
23 Mar 2026 - 17:47
#elementary-number-theory
#definition
#gcd-and-lcm
264
Views
Why are imaginary numbers defined the way they are?
Published on
30 Jan 2018 - 0:03
#number-theory
#complex-numbers
#definition
60
Views
Is this definition of group isomorphism correct?
Published on
30 Jan 2018 - 7:49
#group-theory
#definition
82
Views
What is the defintion of "H preserves all small products and equalizers"?
Published on
30 Jan 2018 - 14:54
#category-theory
#definition
64
Views
Is a set infinite if there exists a bijection between the topological space X and the set?
Published on
17 Mar 2026 - 6:44
#elementary-set-theory
#definition
#infinity
223
Views
Uniqueness up to isomorphism?
Published on
30 Jan 2018 - 19:35
#category-theory
#definition
968
Views
Why does SOH CAH TOA hold?
Published on
30 Jan 2018 - 22:49
#algebra-precalculus
#trigonometry
#definition
#proof-explanation
6.2k
Views
What is the definition of a free abelian group generated by the set $X$?
Published on
22 Mar 2026 - 22:16
#abstract-algebra
#group-theory
#definition
#abelian-groups
#free-abelian-group
918
Views
Cartesian product uniqueness (up to bijection). Need to clarify two questions.
Published on
17 Mar 2026 - 11:59
#category-theory
#definition
#universal-property
329
Views
Understanding the definition of "preserving limits"
Published on
01 Feb 2018 - 16:44
#category-theory
#definition
108
Views
Understanding products in category theory: When is $H(\prod b_i) = \prod H(b_i) \text{ or } H(\prod b_i) \cong \prod H(b_i)$?
Published on
01 Feb 2018 - 18:19
#category-theory
#definition
#examples-counterexamples
83
Views
Can we talk about the $k$-planes in the product of two projective spaces?
Published on
19 Mar 2026 - 19:01
#geometry
#algebraic-geometry
#vector-spaces
#definition
#projective-space
5.7k
Views
Definition of Coprime
Published on
20 Mar 2026 - 7:47
#contest-math
#definition
#real-numbers
#coprime
73
Views
Why this written $\vec{v} \binom{x}{y}= \binom{2}{3}$ is not true in mathematics?
Published on
02 Feb 2018 - 11:32
#geometry
#vector-spaces
#definition
93
Views
Is this $\binom{n}{p}$ for $p>n$ make a sense in mathematics or it is $0$ by convention?
Published on
16 Mar 2026 - 20:26
#probability
#binomial-coefficients
#definition
#convention
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