
redefining command \arraystretch 
couldn't convert character imacr into available encodings, using image
couldn't convert character tbdot into available encodings, using image
couldn't convert character Tbdot into available encodings, using image
couldn't convert character mbdot into available encodings, using image
couldn't convert character amacr into available encodings, using image
couldn't convert character umacr into available encodings, using image
couldn't convert character ndot into available encodings, using image
couldn't convert character lbdot into available encodings, using image
couldn't convert character nbdot into available encodings, using image
couldn't convert character dbdot into available encodings, using image
