Presentation of the MSQAB project

[stem]
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//\dfrac{\partial c_i}{\partial t} = - \nabla \cdot \left ( \mathbf{u} c_i \right)
//     + \nabla \cdot \left ( \rho K \nabla \left ( \dfrac{c_i}{\rho} \right) \right )
//     + \chi_i (c)
//     - \Lambda_i(x,t)c_i
//     + S_i(x,t)
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