Figure 3

(a) Eigenvalue with maximum real part near the bifurcation point. Dashed line for the Legendre solver and solid line for the post-processed reduced basis. (b) Norm of the difference between \(\operatorname{Re}(\sigma_{1})\) obtained with Legendre collocation and with a post-processed reduced basis method based on Legendre collocation. (c) Norm of the difference between \(\operatorname{Re}(\sigma_{1})\) obtained with Legendre collocation and with a post-processed reduced basis method based on Legendre collocation divided by the norm of \(\operatorname{Re}(\sigma_{1})\) obtained with Legendre collocation