The discussion focuses on using the wave equation to describe a closed loop of classical string, emphasizing that it is similar to a linear string but with periodic boundary conditions. A reference to Zwiebach's string theory book is made, suggesting that earlier chapters provide a solid treatment of the topic. The key takeaway is that the wave equation for a non-closed string can be adapted by applying cyclical boundary conditions. This approach simplifies the analysis without delving into quantization. Understanding these concepts is essential for accurately modeling closed loop strings.
