On the Positivity of the Products of Positive Primitive Forms

Yuhang Liu

Let $(V_i,{\omega }_i)$ be real symplectic vector spaces and let ${\Omega }_i\in {\mathcal{U}}^{+}(V_i)$ in the sense of Haiden. We prove that $p_1^{\ast }{\Omega }_1\wedge p_2^{\ast }{\Omega }_2$ belongs to $\mathcal U^+(V_1\oplu…