Abstract
The sixteen generators of Abelian integral $$I(h)=\oint _{\Gamma _h}g(x,y)dx-f(x,y)dy$$ , which satisfy eight different Picard–Fuchs equations respectively, are obtained, where $$\Gamma _h$$ is a family of closed orbits defined by $$H(x,y)=ax^4+by^4+cx^8=h$$ , $$h\in \Sigma $$ , $$\Sigma $$ is the open intervals on which $$\Gamma _h$$ is defined, and f(x, y) and g(x, y) are real polynomials in x and y of degree n. Moreover, an upper bound of the number of zeros of I(h) is obtained for a special case $$\begin{aligned} f(x,y)=\sum \limits _{0\le i\le 4k+1=n}a_ix^{4k+1-i}y^i,\ \ \ g(x,y)=\sum \limits _{0\le i\le 4k+1=n}b_ix^{4k+1-i}y^i. \end{aligned}$$
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