title: Can Eigen use symbolic arithmetic？
body: <p>When I was using Eigen, I was attracted by its excellent library, especially the functions related to matrix calculations.</p>
  <p>However, recently I want to use symbolic arithmetic in the matrix to perform calculations, just like what can be achieved in matlab. Through my search, I found that C++ has a framework like SymEngine that can provide symbolic operations, but it does not seem to be coupled with Eigen to achieve symbolic operations in the matrix.</p>
  <p>I would like to ask everyone, have you encountered this kind of problem, or can you provide a corresponding solution? Or not based on these two frameworks?</p>
  <p>Thanks！</p>