Hasil (
Bahasa Indonesia) 1:
[Salinan]Disalin!
The main perceptions of the “mathematical induction” principle in the professor’s mind as described in figure 1 are: 1. “Mathematical induction” is a jump to infinity; 2. “Mathematical induction” is one axiom of the five axioms of Peano; 3. “Mathematical induction” identifies the set of natural numbers. The formulation of the mathematical induction principle is a fourth perception; our subject (the professor) used the formulation of MI principle in the set theory language. For each perception of the MI principle, we determined a weight. The weight of each perception in each lesson was calculated as the ratio of all the statements (that were used/said by the professor during the lesson) to the total number of statements in the same lesson, figure 2. For example, in the first lesson the teacher emphasized the perception that depends on infinity more than identification of the natural numbers set, but he referred to the Peano’s axioms occasionally and did not refer to the formulation of the principle; this is described in figure 2(a). While during the fourth lesson the professor emphasized only the formulation of the MI principle, figure 2(d). By analogy to the law of gravity in physics, it is clear that the heaviest weight is below and lightest is above, figure 2(a); we have to notice that the sum of all the ratios in figure 2(a) is less than 1, this difference is due to the statements which are not related to the content area. Similarly, figures 2(b), 2(c) and 2(d) describe the representation in the rest three lessons. Notice that the teacher emphasized the "infinity" perception of MI in the first two lessons, and it was negligible in the rest lessons; the "identification" perception was emphasized in the third lesson, the "formulation" perception approached 1 in the fourth lesson, and it was negligible in the first two lessonsTable 1 summarizes the total references of the teacher to each perception of the MI principle during the four lessons; in other words, table 1 provide the ratio between all the statements that refer to some perception and between all the statements that refer to content area during the four lessons.
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