🚀 go-pugleaf

Here's a small problem: I want to define my section numbers so that the
section numbers have a full stop after them. For example:

1. This is the first section

(section material)

and so on. If I use the command
\renewcommand{\thesection{\arabic{section}.}
(which works), then my theorem numbers have two full stops; the first theorem
of section 3 starts (given that I'm using 
\newtheorem{theorem}{Theorem}[section]) like this:

Theorem 3..1. Every number...

Is there any way to avoid this happening?

Thanks in advance for your replies.

Alasdair McAndrew
D
THanks in advance for your