Figure 2
From: Multiwaves, breathers, lump and other solutions for the Heimburg model in biomembranes and nerves
3D and corresponding contour for solution \(\upsilon _{1,2}(x, t)\) with  \(d_2=0.01,~~ d_3=1.5,~~d_4=2.3,~~ d_6=10.3,~~m_1=0.92,~~ m_2=2.6,~~m_4=1,~~ v=0.5,~~ w_1=0.2,~~w_2=2.5\).
