As per your need, I am giving you list of the some colleges in Tamilnadu that offering the post gradation course in Mathematics.

Yadava College, Madurai (Tamil Nadu)
Tiruppalai , Madurai (Madurai Dist.) - 625014

Dr. Zakir Hussain College, Sivagangai (Tamil Nadu)
Ilayangudi , Sivagangai (Sivagangai Dist.) - 630702

Holy Cross College (Autonomous), Tiruchirappalli (Tamil Nadu)
Teppakulam, PB. 318 , Tiruchirappalli (Tiruchirappalli (Trichy) Dist.) - 620002

Govindammal Aditanar College for Women, Tuticorin (Tamil Nadu)
Tiruchendur , Tuticorin (Toothukudi (Tuticorin) Dist.) - 628215

Dr. RK Shanmugam College of Arts and Science, Villupuram (Tamil Nadu)
P.O.Box No: 23, Indili, Kallakurichi , Villupuram (Villupuram Dist.) - 606202

Meenakshi Ramasamy Arts and Science College, Perambalur (Tamil Nadu)
Trichy Main Road, M.R. Kalvi nagar, Thathanur (PO), Udayarpalayam (Tk) , Perambalur (Perambalur Dist.) - 621804

Srinivasan College of Arts and Science, Perambalur (Tamil Nadu)
Thuraiyur Road , Perambalur (Perambalur Dist.) - 621212

Dhanalakshmi Srinivasan College of Arts and Science for Women, Perambalur (Tamil Nadu)
Thuraiyur Road , Perambalur (Perambalur Dist.) - 621212

Dhanabagiyam Krishnaswamy Mudaliar College for Women (DKM College for Women), Vellore (Tamil Nadu)
No.57, D.K.M. College for Women, Sainathapuram , Vellore (Vellore Dist.) - 632001

Chidambaram Pillai College for Women, Tiruchirappalli (Tamil Nadu)
Mannachanallur , Tiruchirappalli (Tiruchirappalli (Trichy) Dist.)

Vivekananda College of Arts and Science, Kanyakumari (Tamil Nadu)
Agastheeswaram Post, Agastheeswaram , Kanyakumari (Kanyakumari Dist.) - 629004


Kongunadu Arts and Science College, Coimbatore (Tamil Nadu)
G.N. Mills Post , Coimbatore (Coimbatore Dist.) - 641029

Quaid-E-Millath Government College for Women, Chennai (Tamil Nadu)
754, Anna Salai , Chennai (Chennai Dist.) - 600002

The New College, Royapettah (Tamil Nadu)
87, Peter’s Road , Royapettah (Chennai Dist.) - 600014

Gobi Arts and Science College, Erode (Tamil Nadu)
Gobichettipalayam, Karattadipalayam , Erode (Erode Dist.) - 638453