Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Bidyut sinha
see the first page...where u can see the definition of Group...Now in the second page ,the Matrices that I have written that will follow all properties of group...such as {I, sigma x} Check this ...here first (I *sigma x)=sigma x belongs to that group...so proof of (a) closure property... Similar it follows all the property of the group...Such a way, we can form 16 matrices that I have written...