S. No.  Topics Dowload Link 
1 Geometry by Raghwendra Mishra  

2 Group by Gaurav Varshney
3 .Normal Subgroup and Homomorphism
4 Permutation Group
5 Properties of Gamma Function
6 Ring by Gaurav Varshney
7 Subring and Ideal
8 Vector Spaces
9 CONVERGENCE OF POSITIVE SERIES-GAURAV VARSHNEY
 10 INFINITE SERIES- GAURAV VARSHNEY
11 LIMIT OF FUNCTION – GAURAV VARSHNEY
12 LINEAR TRANFORMATIONS- GAURAV VARSHNEY
13 REAL FUNCTIONS-GAURAV VARSHNEY
14 REAL SEQUENCES-GAURAV VARSHNEY
15 Group  

16 SUBGROUP  
17 PERMUTATION GROUP  
18 ORDER OF AN ELEMENT OF A GROUP, … NORMAL SUBGROUP AND HOMOMORPHISM  
19 GROUP HOMOMORPHISM
20 RING-DEFINITION AND EXAMPLES  
21 RIEMANN INTEGRATION BY GAURAV VARSHNEY