@Jero - did you mean page 2 or page 4? All pages look fine here. I can see two Pi characters in the first formula on page 4. Can you attach a screenshot from Evince and a screenshot from Xpdf or Adobe Reader?
@Jero - did you mean page 2 or page 4? All pages look fine here. I can see two Pi characters in the first formula on page 4. Can you attach a screenshot from Evince and a screenshot from Xpdf or Adobe Reader?