You are asking about ordinary differential equations. Is the undergraduate thesis easy to write? It's hard to write. Because writing undergraduate thesis of ordinary differential equations needs a lot of accumulation and practice, write gap well, and then draw out the value of your own research; There must be sufficient data of ordinary differential equations and in-depth discussion of the results, which requires the logic of ordinary differential equations to be smooth and the whole writing to be smooth. Therefore, it is difficult to write an undergraduate thesis on ordinary differential equations.