coherent
� � : � � � ��F� � P�́�VWU��~~�v �|�=-ut�~ �}�E�=i t =s tP�P�Q� �6 ��~ �u� ������t1� � = |�F P��P���� ��F �N��� �N�F �{��~~�F @@P� ������6 �r��]_^�VWU��v�<