Pal, B K <br/><br/>
Engineering mathematics vol. IV 
B K pal, k.Das 
 - vol-4 
 - Kolkata:   u.n dhur and sons private limited;  2009 
 - 582p:  23cm 
<br/><br/> Set Theory  Group Modulo Group  Subgroup  Homomorphism and isomorphism  Ring and filed  Po sets and lattice  Boolean Algebra  Recusrion and recuurece relations  Graph Di Graph and Functions  Trees and Fundamental circuit 
<br/><br/><label>Dewey Class. No.: </label>51.62  / PAL