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15
Math.TechQA.Club
2026-04-13 08:23:30
899
Views
What is a Real Number?
Published on
13 Apr 2026 - 8:23
#real-analysis
#definition
751
Views
Two definitions of graded rings
Published on
10 Apr 2026 - 9:59
#abstract-algebra
#ring-theory
#definition
#graded-rings
1.2k
Views
Definition: Eigenspace of a matrix
Published on
13 Apr 2026 - 18:45
#matrices
#definition
#eigenvalues-eigenvectors
2.6k
Views
A proper formal definition of the Ordinal numbers?
Published on
12 Apr 2026 - 9:53
#set-theory
#definition
#ordinals
332
Views
Definition of "or"
Published on
15 Apr 2026 - 11:44
#definition
130
Views
Definition of $\ell_\infty$
Published on
10 Apr 2026 - 15:38
#analysis
#definition
1.7k
Views
Time-invariant IVP
Published on
16 Apr 2026 - 20:11
#ordinary-differential-equations
#definition
#invariance
308
Views
What is the proper term for a function where domain and codomain coincide?
Published on
12 Apr 2026 - 8:41
#functions
#terminology
#definition
151
Views
Definition of a groupoid of fractions
Published on
14 May 2026 - 15:03
#category-theory
#definition
#groupoids
46
Views
Definition clarifications on functions of vectors and their derivatives
Published on
10 Apr 2026 - 13:53
#analysis
#vector-spaces
#definition
2.4k
Views
Differentiability of a matrix function
Published on
09 Apr 2026 - 16:57
#analysis
#matrices
#definition
1.6k
Views
What's the name for the property of a function $f$ that means $f(f(x))=x$?
Published on
14 Apr 2026 - 16:50
#abstract-algebra
#matrices
#complex-numbers
#definition
986
Views
Exact sequence in a nonabelian category [previously: "Exact sequence for topological groups?"]
Published on
16 Apr 2026 - 22:47
#reference-request
#category-theory
#definition
#topological-groups
10.7k
Views
Rank and signature of a quadratic form
Published on
17 Apr 2026 - 3:51
#linear-algebra
#definition
92
Views
Restricted bilinear map
Published on
12 Apr 2026 - 0:57
#linear-algebra
#definition
#bilinear-form
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