# Notation issues

I'm trying to read 'Wavelets on the 2-Sphere: A Group Theoretical Approach' by Antoine and Vanderghynst, available at http://citeseer.ist.psu.edu/antoine98wavelets.html. They introduce $$\mathbb{R^+_*}$$. Unfortunately, they don't seem to define this anywhere in the paper, and I've never come across such notation before. Anybody got any ideas?

quasar987
Homework Helper
Gold Member
Could it mean "positive reals excluding zero" ?

When I was in elementary school, this was what the author of our textbook had it mean (as far as i can remember).

That makes sense in the context :) thanks