Introduction to Vertex Operator Algebras

--- Base version+++ Proposed version@@ -34,6 +34,6 @@     where $\dim V_h<\infty$ and $V_h=0$ for sufficiently negative $h$. A state in $V_h$ has **conformal weight** $h$. -We denote the VOA by $(V,Y,\mathbf1,\omega)$. The VOA is called **CFT type** if they satisfy additional conditions $V_h=0$ for $h<0$ and $V_0=\mathbb C\mathbf1$ define.+We denote the VOA by $(V,Y,\mathbf1,\omega)$. The VOA is called **CFT type** if they satisfy additional conditions $V_h=0$ for $h<0$ and $V_0=\mathbb C\mathbf1$. :::