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 Infinitely many solutions for critical fractional equation with sign-changing weight function Wei Chen,Chunlei Tang Keywords:Fractional Schr\ Abstract: In this work, we consider the fractional Schr\"{o}dinger type equations with critical exponent, concave nonlinearity and sign-changing weight function on $\mathbb{R}^N$. With the aid of the symmetric Mountain Pass Theorem, we prove this problem has infinitely many small energy solutions.