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Questions related to various forms of integration including the Riemann integral, Lebesgue integral, Riemann–Stieltjes integral, double integrals, line integrals, contour integrals, surface integrals, integrals of differential forms, ...

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The perturbation of non-Hamiltonian algebraic vector fields

This paper contains a conjecture and a partial result about the abelian integral under discussion :"Computer-assisted techniques for the verification of the Chebyshev property of Abelian integrals" …
Ali Taghavi's user avatar
1 vote
Accepted

Help trying to show that $p_0a_1 =0$

Apply holomorphic functional calculus to the following functions which are defined on a disconnected open set in the plane containing $\Gamma_0 , \Gamma_1$ $f(z)=\begin{cases} 1& \text{Aro …
Ali Taghavi's user avatar
3 votes
1 answer
263 views

An Stokes type theorem for some operations other than integral

Let $M$ be a compact $m$ dimensional manifold with boundary $\partial M$. Assume that $I_{1}, I_{2}$ are two linear functionals on $\Omega^{m}(M), \Omega^{m-1}(\partial M)$, respectively. Assume tha …
Ali Taghavi's user avatar
14 votes
1 answer
2k views

The perturbation of non-Hamiltonian algebraic vector fields

In this question, we are interested in the number of limit cycles which appears in the following perturbational system: \begin{equation}\cases{ x'=y -x^{2}+\epsilon P(x,y) \\ y'=-x+\epsilon Q(x,y) } …
Ali Taghavi's user avatar