12 � � � � � � ϵ

� � � ִ � � � е � У � Ϊ � � � � � 㲻 ͬ � Ĺ � � � Ҫ � � ֻ � � һ � Գ � � ִ � � � � � � � � Dz � � � � ģ � ͨ � � � � һ ϵ � f � � ֹ � ͬ � � � � � � � � � � � � һ ϵ � f � � � � � ɵ Ĵ � � � ϵ ͳ � � Ϊ � � ϵ � �
� � � � � ϵ � и � � � � ֵ � � � � ߻ � � � ƽ � У � � � � Ϊ ƽ � � � � ϵ � � � � � � � Ϊ � ռ � � � ϵ � �
� � � � � � ϵ � � ת ʱ � � � ֵ � � � � � lambda � � � � � � ڻ � � � � Ƿ � ̶ � � � � ֽ � � � ϵ � � Ϊ � � � � � ࣺ � � � � � � ϵ � � � � � � � � ϵ � �
� � � � � � Ҫ � � � � � � ϵ � Ĵ � � � � ȼ � � � � ת � � ȷ � � � � � � � � Ҫ � � � � � � � ͳ � � ִ � � � װ � u � � � � � � � � �