[Tugindia] zero nbh and Power set symbol

[yoga at math.iisc.ernet.in]

> On Wed, 19 Nov 2003, Bhaskaracharya Pratishthana wrote:
> 
> > This is the symbol which like shell or curve starts from point and after 
> > following circular path 1 rotation then instead of closing the circle it 
> > smoothly go for outer circular path...like concentric circle put not 
> > exaclty circles...difficult to explain.

Have you tried ${\cal O}$? 

Regards......................yoga

--------------------------------------------------------------
C S Yogananda
MO-Cell (NBHM, DAE)
Dept. of Mathematics
Indian Institute of Science
Bangalore - 560012
Ph: 2932265 (O)
    6524056 (R)
--------------------------------------------------------------