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0 votes

2 answers

185 views

Invariance of generalized eigenspace

asked Dec 1, 2020 at 19:27

0 votes

0 answers

205 views

Directed curvature of a curve

asked Dec 12, 2018 at 14:47

1 vote

1 answer

2k views

Show that a curve is a geodesic on a surface.

asked Nov 12, 2018 at 19:34

1 vote

2 answers

1k views

Ruled surface with negative/zero gaussian curvature.

asked Nov 5, 2018 at 18:15

0 votes

3 answers

57 views

Value of a alternating series $\sum_{n=0}^{\infty}\frac{(-1)^n}{(n+1)!}$ [closed]

asked Jun 13, 2017 at 15:36

0 votes

2 answers

138 views

Using epsilon delta to show limit for function of two variables

asked Jun 13, 2017 at 11:07

0 votes

2 answers

106 views

If $S$ is open and $S = A \cup B$ where $\overline{A} \cap B = A \cap \overline{B} = \emptyset$, then $A$ and $B$ are open.

asked Apr 5, 2017 at 16:35

0 votes

1 answer

1k views

prove that if a nonempty subset $S$ of $\mathbb{R}^n$ is both open and closed, then $S=\mathbb{R}^n$ [duplicate]

asked Apr 3, 2017 at 16:47

1 vote

1 answer

129 views

Uniform convergence and integrability of a sequence

asked Mar 13, 2017 at 17:31

2 votes

2 answers

483 views

Show that a function is differentiable

asked Jan 29, 2017 at 15:54

1 vote

3 answers

125 views

Showing continuity of a function by epsilon delta

asked Jan 23, 2017 at 13:27

0 votes

0 answers

70 views

Continuity of a piecewise function.

asked Jan 16, 2017 at 14:56

0 votes

1 answer

35 views

Continuity of a function for all points

asked Jan 16, 2017 at 13:25

1 vote

0 answers

653 views

Verifying that the set {0,1} is a field

asked Oct 16, 2016 at 13:16

0 votes

0 answers

47 views

How to calculate an unknown variable?

asked Oct 2, 2016 at 13:15

3 votes

2 answers

853 views

If $A$ is a real symmetric matrix, then $A$ has real eigenvalues.

asked Aug 30, 2016 at 13:10

2 votes

1 answer

463 views

Understanding why $(a^{-1})^{-1} = a$ in a group

asked Aug 28, 2016 at 21:08

1 vote

0 answers

326 views

Vector rotation in the $xy$-plane

asked Jun 9, 2016 at 23:38

0 votes

2 answers

65 views

Homomorphism of groups

asked Apr 28, 2016 at 16:54

0 votes

1 answer

339 views

Considering isomorphism of groups and their properties

asked Apr 20, 2016 at 20:53

1 vote

0 answers

31 views

Consider a set consisting of matrices and show it is a group.

asked Apr 14, 2016 at 16:39

1 vote

2 answers

694 views

Argue that real matrices which are orthogonal form a group

asked Apr 11, 2016 at 18:23

1 vote

2 answers

6k views

Solving a system of differential equations using diagonalization

asked Apr 3, 2016 at 19:13

0 votes

2 answers

43 views

Verify that $A$ satisfies the stated conditions and find the angle of rotation.

asked Apr 2, 2016 at 23:35

0 votes

1 answer

3k views

Show that $A$ is orthogonal iff the column vectors of $A$ form an orthonormal basis

asked Apr 2, 2016 at 19:33

34 votes

4 answers

76k views

Show that the eigenvalues of a unitary matrix have modulus $1$

asked Mar 28, 2016 at 20:39

1 vote

1 answer

56 views

Exchange Rate Dynamics

asked Mar 28, 2016 at 13:16

0 votes

2 answers

57 views

Rules of logarithm

asked Mar 27, 2016 at 15:02

0 votes

1 answer

4k views

Show that the orthogonal projections on the coordinate axes are matrix operators

asked Mar 22, 2016 at 13:02

1 vote

1 answer

57 views

Consider $g(p)=xf(p)$ and linearity and construct the matrix for the transformation.

asked Mar 21, 2016 at 23:17

Stack Exchange Network

77 Questions

Invariance of generalized eigenspace

Directed curvature of a curve

Show that a curve is a geodesic on a surface.

Ruled surface with negative/zero gaussian curvature.

Value of a alternating series $\sum_{n=0}^{\infty}\frac{(-1)^n}{(n+1)!}$ [closed]

Using epsilon delta to show limit for function of two variables

If $S$ is open and $S = A \cup B$ where $\overline{A} \cap B = A \cap \overline{B} = \emptyset$, then $A$ and $B$ are open.

prove that if a nonempty subset $S$ of $\mathbb{R}^n$ is both open and closed, then $S=\mathbb{R}^n$ [duplicate]

Uniform convergence and integrability of a sequence

Show that a function is differentiable

Showing continuity of a function by epsilon delta

Continuity of a piecewise function.

Continuity of a function for all points

Verifying that the set {0,1} is a field

How to calculate an unknown variable?

If $A$ is a real symmetric matrix, then $A$ has real eigenvalues.

Understanding why $(a^{-1})^{-1} = a$ in a group

Vector rotation in the $xy$-plane

Homomorphism of groups

Considering isomorphism of groups and their properties

Consider a set consisting of matrices and show it is a group.

Argue that real matrices which are orthogonal form a group

Solving a system of differential equations using diagonalization

Verify that $A$ satisfies the stated conditions and find the angle of rotation.

Show that $A$ is orthogonal iff the column vectors of $A$ form an orthonormal basis

Show that the eigenvalues of a unitary matrix have modulus $1$

Exchange Rate Dynamics

Rules of logarithm

Show that the orthogonal projections on the coordinate axes are matrix operators

Consider $g(p)=xf(p)$ and linearity and construct the matrix for the transformation.