Yuhang Liu

On the Positivity of the Products of Positive Primitive Forms

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 $p_1^*\Omega_1\wedge p_2^*\Omega_2$ belongs to $\mathcal U^+(V_1\oplus V_2)$ whenever one factor has real dimension at most six. There are forms $\Omega\in\mathcal{U}^+(\mathbb{R}^6)\setmin...