Drastically improving the performance of `diop_DN` by implementing `special_diop_DN`.
Drastically improving the performance of `diop_DN` by implementing `special_diop_DN`.

chaffra/sympy,chaffra/sympy,skidzo/sympy,madan96/sympy,yashsharan/sympy,kaushik94/sympy,jaimahajan1997/sympy,kaushik94/sympy,kaushik94/sympy,yashsharan/sympy,jaimahajan1997/sympy,madan96/sympy,madan96/sympy,skidzo/sympy,yashsharan/sympy,chaffra/sympy,skidzo/sympy,jaimahajan1997/sympy