Item 1 (0C81)—The Stacks project

are given by

$\left( \begin{matrix} m_1 \\ m_2 \\ m_3 \\ m_4 \end{matrix} \right), \quad \left( \begin{matrix} -2w & w & w & w \\ w & -2w & 0 & 0 \\ w & 0 & -2w & 0 \\ w & 0 & 0 & -2w \end{matrix} \right), \quad \left( \begin{matrix} w \\ w \\ w \\ w \end{matrix} \right)$

with $2m_1 \geq m_2 + m_3 + m_4$ , $2m_2 \geq m_1$ , $2m_3 \geq m_1$ , $2m_4 \geq m_1$ . Observe that this implies $m_1 \geq \max (m_2, m_3, m_4)$ .

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