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We prove uniqueness and existence of the weak solutions of Euler equationswith helical symmetry, with initial vorticity in $L^{\infty}$ under "novorticity stretching" geometric constraint. Our article follows the argument ofthe seminal work of Yudovich. We adjust the argument to resolve thedifficulties which are specific to the helical symmetry.

Global Existence and Uniqueness of Weak Solutions of 3-D Euler Equations with Helical Symmetry in the Absence of Vorticity Stretching