<![CDATA[Thisis a qualitative research aimedatuncoveringthemistakes and difficulties ofmathematics education students of Unismuh in negating the definition of limit of function.Theresearchsubjectsweretwostudentsofthesecondsemesterofthemathematicseducation study program of Unismuh with high ability in mathematical logic. This studyused a methodological triangulation technique to check the validity of the data. It was toprovide the subjects with tests and interviews. There were two supporting instruments inthis study, namely, a test such a mathematical logic ability test which was used to select the students to be there search subjects, andatest for investigating their ability to negate the definition of limit of function. The results show hat the two subjects have similarities anddifferences. One of them experiences all the types of Newman errors, and the other onehasno transformation error type only. The two subjects experience the same difficulty indealing with statements with multiple quantifiers. They have difficulty in justifying thequantifier and its meaning. Also, difficulty in finding the function of thestatement andjustifying the part to negate]]>
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