## Mathematical Analysis## Calculus Basics |

## What are left- and right-limits? |

When a function is not defined around the point *c* (see the notation in the equation above), but only to the left or right of point *c*, then the limits are called the left-limit and right-limit at *c.* The formal left- and right-limit equations are the same as the usual limit equation, except below the “lim” sign, the *x → c* is written as *x → c*+ for the left-limit and *x → c*+ for the right limit.