Update README.md

Author: sandeep026

README.md

@@ -50,7 +50,7 @@ Using the principle, we use IPOPT to solve the system of nonlinear equations. Ca
 A key feature of pseudospectral collocation is rapid decrease in discretization error with increasing grid size. However, for larger N ($\geq 100$),
 the problem can get numerically ill-conditioned.
 
-Some solutions include using knotting, preconditioners and Birkhoff collocation.
+Some methods to mititgate ill-conditioning include using knotting, preconditioners and Birkhoff collocation.
 
 ![image](exp.svg)