In a book I am reading on modern physics (reading it yes, *understanding* it on the other hand… ) I’ve come across the following passage

My question is, what does the “exp” mean? does it mean the polynomial is raised to this power? Or does it mean the expression within the brackets is the base of an exponent? I haven’t ween this notation before.

later, in a discussion of half-life the book uses the following expression

```
x[sup]-n[/sup] =exp{-n lnx}
from high school algebra I know that
ln x[sup]-n[/sup] = -n lnx
But I'm having a bit of brain freeze on the exp{} notation.
Any help guys? Thanks in advance
```