Styleguide.md

@@ -154,4 +154,15 @@ Note that using a BibTeX file your `.md`-file will no longer contain the referen
 ## References
 
 ```
-at the end of the `.md`-file.
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+at the end of the `.md`-file.
+
+# Typesetting Theorems
+
+You may want to try something like this
+```markdown
+**Theorem**\
+An operator $A$ on a Banach space $X$ is bounded if and only if it is continuous.
+```
+in order to achieve this:
+
+![image](uploads/2b570c5132ad7c824700e7bdda2017e6/image.png)
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