On the Study of Second-Order Wave Theory and Its Convergence for a Two-Fluid System

<table>Ratios of the second-order amplitude to the first-order amplitude for Stokes waves with various wave slopes. Solid lines for internal waves and dash lines for surface waves.</table>

Mathematical Problems in Engineering

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Figure 3

Figure 3: On the Study of Second-Order Wave Theory and Its Convergence for a Two-Fluid System 