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user9867
  • Member for 4 years, 5 months
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2 votes
2 answers
92 views

Find eigenvalues of a linear map knowing its eigenvectors

2 votes
2 answers
1k views

Verify that the equation of a plane is this determinant.

2 votes
1 answer
38 views

Calculate surface integral with force

2 votes
1 answer
200 views

Solve the integral $\int^{+\infty}_0\frac{x\sin x}{1+x^4}dx$ using complex analysis

1 vote
1 answer
433 views

Surface integral (paraboloid and sphere intersection)

1 vote
1 answer
64 views

Is $f - 3I$ an isomorphism if $f$ is orthogonal?

1 vote
3 answers
107 views

Complex Analysis: Show that $\int_{C_\epsilon} \frac{1}{(z-x_0)^{2n+1}}dz = 0$

1 vote
2 answers
646 views

Solve complex integral: $\int_{0}^{2\pi} \frac{\cos{3\theta}}{5-4\cos\theta}d\theta$

1 vote
3 answers
1k views

Prove that $f(x)=\lfloor x\rfloor$ is Riemann integrable on $[0,5]$

1 vote
4 answers
105 views

Calculate a limit with an integral within proving that it's possible to use the L'Hôpital rule

1 vote
0 answers
59 views

Prove that $f$ is diagonalizable if and only if $\sum_{i=0}^n \lambda_{i} \neq 0$

1 vote
1 answer
124 views

Prove F is continuous in the [0,2] interval even if f is not.

1 vote
7 answers
4k views

Integrate $\int \frac{dx}{\sqrt{-ax^2 + bx +c}} $

1 vote
1 answer
232 views

How to introduce variations on the competitive Lotka-Volterra model?

1 vote
2 answers
146 views

Ecological interpretation of Lotka-Volterra model

1 vote
1 answer
242 views

Calculate integral using Green's Theorem

1 vote
1 answer
80 views

Solving path integral

1 vote
2 answers
78 views

Find the area of a surface

0 votes
1 answer
1k views

Prove that $||x-y||·||x+y|| < ||x||^2+||y||^2$ [duplicate]

0 votes
2 answers
142 views

Determine boundary and whether the set $A = \{(x,y)\in R^2 : x^2 < y <x\}$ is open or closed.

0 votes
1 answer
41 views

Show that $\nabla(v\cdot A) - (v\cdot \nabla)A = v \times (\nabla \times A)$

0 votes
1 answer
105 views

Determine wheter the set $B = \{ (x,y) \in \mathbb R^2 | 3x^2 + 2y^2 \lt 6 \}$ is open or closed and calculate its boundary

0 votes
1 answer
83 views

Conditions five parameters have to satisfy to make matrix $A$ diagonalizable

0 votes
1 answer
34 views

Prove about eigenvectors and eigenvalues [duplicate]

0 votes
3 answers
85 views

Find eigenvalues anf eigenvectors of $f(p(x)):=p'(x)$

0 votes
1 answer
64 views

Express $\int \tan^n(x)dx$ in terms of $\int \tan^{n-2}(x)dx$. [duplicate]

0 votes
2 answers
57 views

Linear maps ranks: true or false? [closed]

0 votes
4 answers
831 views

If $A^2 + A +I = 0$, then A is diagonalizable. True or false?

0 votes
0 answers
121 views

Show that $\int_0^{\pi} \frac{1}{(a+\cos\theta)^2}d\theta = \frac{a\pi}{(\sqrt{a^2-1})^3}; \;\;a>1$ [duplicate]

0 votes
0 answers
21 views

Looking for a fitting function