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15
Math.TechQA.Club
2026-04-16 15:50:05
60
Views
A four-term sequence of vector spaces is exact if and only if the intermediate map is an isomorphism
Published on
16 Apr 2026 - 15:50
#linear-algebra
#abstract-algebra
#solution-verification
#homology-cohomology
#exact-sequence
50
Views
Don’t you need to prove operations in algebra are functions first?
Published on
12 Apr 2026 - 11:39
#algebra-precalculus
#functions
#solution-verification
#proof-explanation
74
Views
Prove that for any sets A and B there is a unique C such that $A \triangle C=B$; C is not unique!
Published on
14 Apr 2026 - 20:21
#discrete-mathematics
#solution-verification
#proof-writing
#proof-explanation
#fake-proofs
270
Views
What is wrong with this limit argument?
Published on
12 Apr 2026 - 4:45
#calculus
#limits
#solution-verification
#limits-without-lhopital
63
Views
Is function substitution valid in proofs? If so, what are the restrictions?
Published on
10 Apr 2026 - 23:11
#calculus
#limits
#solution-verification
#fake-proofs
89
Views
To prove stronger form of mathematical induction
Published on
25 Apr 2026 - 15:11
#solution-verification
#induction
1.2k
Views
Is my Proof of Pythagorean Theorem by Trigonometry correct?
Published on
12 Apr 2026 - 15:10
#trigonometry
#solution-verification
#triangles
#angle
112
Views
Prove that the Lebesgue function is continuous
Published on
11 Apr 2026 - 9:16
#real-analysis
#probability-theory
#measure-theory
#solution-verification
24
Views
Lower semi continuity of the Closure
Published on
13 Apr 2026 - 16:19
#real-analysis
#functional-analysis
#multivariable-calculus
#optimization
#solution-verification
60
Views
problem in a basic initial value problem $ \begin{cases} \ y'=t(y-1)^2\\ \ y(0)=0\\ \end {cases} $
Published on
15 Apr 2026 - 17:57
#ordinary-differential-equations
#solution-verification
#initial-value-problems
42
Views
Altitudes of a rhombus form a rectangle
Published on
27 Apr 2026 - 14:02
#geometry
#solution-verification
#euclidean-geometry
168
Views
Let $f$ and $g$ be two positive valued functions defined on $[-1,1]$, such that $f(x)f(-x)=1$, and $g$ is an even function with
Published on
16 Apr 2026 - 6:28
#calculus
#solution-verification
#problem-solving
137
Views
Determination of the Groups of Order $99$
Published on
15 Apr 2026 - 5:36
#abstract-algebra
#group-theory
#solution-verification
#sylow-theory
37
Views
Prove that at some point on a parametric curve, the tangent line is parallel to the line segment between two points on the curve
Published on
15 Apr 2026 - 19:00
#calculus
#solution-verification
43
Views
In how many ways can $4$ ppl be given $5$ different prizes and $7$ identical candy bars so that each person gets something? Need solution verification
Published on
17 Apr 2026 - 1:58
#combinatorics
#solution-verification
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