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ShellRox
  • Member for 6 years, 5 months
  • Last seen more than a month ago
9 votes
0 answers
648 views

How exactly does Hahn-Banach theorem explain duality of vector spaces?

6 votes
3 answers
3k views

Understanding the concept of $(X^TX)^{-1}X^Ty$

5 votes
0 answers
800 views

Showing that Liouville's numbers are transcendental (Liouville's theorem)

4 votes
2 answers
257 views

Solving $\int{\frac{2x^{4}-5x^{3}+11x^{2}-2x-10}{x^{3}-3x^{2}+7x-5}dx}$

4 votes
3 answers
2k views

Proper way to find change-of-basis matrix

3 votes
4 answers
973 views

Showing injective property of derivative map over vector space of polynomials

3 votes
1 answer
568 views

Showing scalar product properties on certain matrix multiplication

3 votes
1 answer
2k views

Writing projection in terms of projection matrix

3 votes
1 answer
327 views

Index of nullity of orthogonal complement of vector space

2 votes
1 answer
149 views

Observing kernel dimensions of non-zero functionals

2 votes
2 answers
2k views

Geometric justification of a rotation matrix

2 votes
3 answers
436 views

Inductively simplify specific Vandermonde determinant

2 votes
1 answer
2k views

Main properties of smooth functions that vanish outside the certain interval

2 votes
3 answers
5k views

Solving least squares problem using partial derivatives

2 votes
2 answers
5k views

Why is the matrix invertible if its null space is zero?

2 votes
1 answer
2k views

Finding orthonormal basis of subspace spanned by two functions

2 votes
1 answer
994 views

Dimension of kernel subspace of trace transformation

2 votes
2 answers
1k views

Showing that image of a certain linear map is either trivial or a straight line

2 votes
2 answers
356 views

Linear map $L \neq O$ having trivial image only at $L^2=L \circ L$

1 vote
1 answer
258 views

Describing the image under $F$ of the points lying on the circle.

1 vote
0 answers
131 views

Getting basis of solution space without Gaussian elimination

1 vote
1 answer
3k views

Proving that function space is a vector space over field

1 vote
1 answer
1k views

Showing that set of all vectors orthogonal to two vectors is a subspace.

1 vote
1 answer
355 views

Proper way to use projection matrix equation

1 vote
1 answer
1k views

How is Carmichael's function subgroup of Euler's Totient function?

1 vote
2 answers
4k views

Function for a free throw trajectory of ball

1 vote
2 answers
1k views

Proving that Euler's Totient Function is multiplicative by Abstract Algebra

1 vote
2 answers
6k views

How is "integers ${\rm mod} ~n$ under addition" a cyclic group?

1 vote
1 answer
495 views

Are bump functions even within their compact support?

1 vote
0 answers
83 views

Showing isomorphism between two models of real numbers