No for Mathematical sciences you aren't eligible since you don't have direct subject intrusion to Mathematics/Applied Mathematics in your PG. But you can go for the Interdisciplinary Mathematical Science like Economics and Commerce and Management.

So as per your qualification you are eligible for UGC NET Economics, Commerce and Management provided you should have 55% marks in your PG and if you are a reserved candidate then you should have 50% marks in your PG.

To know more about CSIR NET visit the link below:

https://competition.careers360.com/articles/csir-ugc-net

I hope this helps. All the very best for your future endeavors!