2Ruhama Even,Subject - matter knowledge and pedagogical content knowledge:prospective secondary teachers and the function concept[J] .Journal for Research in Mathematics Education, 1993, ( 24 ).
3Vinner,S.The role of detinitions in the teaching and learning of mathematics[A] .D.Tall ( Ed. ) .1994 A dvanced Mathematical Thinking[C].Kluwer Academic Publishers.
4Vinner,S.and Dreyfus,T.Images and definitions for the concept of function[J] .Journal for Research in Mathematics Education,1989, (20).
