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We prove local well-posedness of partially periodic and periodic modifiedKP-I equations, namely for $\partial_t u+(-1)^{\frac{l+1}{2}}\partial^l_xu-\partial_x^{-1}\partial_y^2 u+u^2\partial_x u=0$ in the anisotropic Sobolevspace $H^{s,s}(\mathbb{R}\times \mathbb{T})$ if $l=3$ and $s>2$, in$H^{s,s}(\mathbb{T}\times \mathbb{T})$ if $l=3$ and $s>\frac{19}{8}$, and in$H^{s,s}(\mathbb{R}\times \mathbb{T})$ if $l=5$ and $s>\frac{5}{2}$. All threeresults require the initial data to be small.

Local wellposedness of the modified KP-I equations in periodic setting with small initial data