Short course on $\Theta_n$-spaces -- lecture 2

 In these talks I will explain how $(\infty,n)$-categories can be modeled by $\Theta_n$-spaces. The topics I'm going to cover are roughly:

1. Segal's delooping machine and complete Segal spaces.

2. Strict $n$-categories and the category $\Theta_n$.

3. $\Theta_n$-spaces as $(\infty,n)$-categories.