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15
Math.TechQA.Club
2026-04-14 18:41:58
940
Views
Example of a set that is Dedekind-finite but not Tarski-finite?
Published on
14 Apr 2026 - 18:41
#elementary-set-theory
#definition
130
Views
One definition of the determinant of a matrix
Published on
14 Apr 2026 - 11:40
#matrices
#definition
#determinant
348
Views
About definition of "direct sum of $p$-vector subspaces"
Published on
10 Apr 2026 - 12:49
#linear-algebra
#vector-spaces
#modules
#definition
#direct-sum
216
Views
What is the name for the property that a subset of a set follows the same rules as the set?
Published on
12 Apr 2026 - 19:35
#notation
#terminology
#definition
342
Views
I'm confused about the definition of poset.
Published on
13 Apr 2026 - 19:00
#elementary-set-theory
#definition
#order-theory
4.2k
Views
What is the zero subscheme of a section
Published on
11 Apr 2026 - 7:08
#algebraic-geometry
#definition
#sheaf-theory
#schemes
440
Views
Have any definitions in mathematics been redefined
Published on
08 Apr 2026 - 17:43
#soft-question
#continuity
#definition
#math-history
#big-list
64
Views
Definition of "point" and "vector" in $\Bbb{R}^n$, and a model for $\Bbb{A}^n(\Bbb{R})$..
Published on
15 Apr 2026 - 21:28
#linear-algebra
#geometry
#definition
2.8k
Views
Tangent space to a surface at boundary points
Published on
04 Apr 2026 - 3:44
#differential-geometry
#definition
#surfaces
#manifolds-with-boundary
98
Views
definition of a fiber bundle
Published on
11 Apr 2026 - 9:05
#algebraic-topology
#definition
100
Views
Point as an element of an affine space vs point as an element of a topological space?
Published on
15 Apr 2026 - 20:06
#general-topology
#geometry
#elementary-set-theory
#definition
#computational-geometry
2.6k
Views
$\hom(V,W)$ is canonic isomorph to $\hom(W^*, V^*)$
Published on
16 Apr 2026 - 9:04
#linear-algebra
#definition
#self-learning
#vector-space-isomorphism
120
Views
Indecomposable groups vs. indecomposable objects
Published on
14 Apr 2026 - 0:21
#group-theory
#category-theory
#definition
#math-history
7.1k
Views
Definition of "the surface measure"?
Published on
13 Apr 2026 - 11:18
#real-analysis
#measure-theory
#definition
#polar-coordinates
100
Views
About definition of recursive sequence
Published on
09 Apr 2026 - 2:44
#sequences-and-series
#definition
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