This is a list of different ways of thinking about or conceiving of the derivative, rather than a list of different logical definitions. Unless great efforts are made to maintain the tone and flavor of the original human insights, the differences start to evaporate as soon as the mental concepts are translated into precise, formal and explicit definitions. I can remember absorbing each of these concepts as something new and interesting, and spending a good deal of mental time and effort digesting and practicing with each, reconciling it with the others. I also remember coming back to revisit these different concepts later with added meaning and understanding. (引用終り) 0714現代数学の系譜 雑談 ◆yH25M02vWFhP 2020/07/12(日) 10:08:29.29ID:/6i4k5qr>>712 >WILLIAM P. THURSTON ｗｗｗ（＾＾
補足 ・WILLIAM P. THURSTON氏は、>>712の(1)〜(7)の７つを、 微分（derivative of a function）について 挙げている ・(3)がεδ論法だが、”εδマンセー”ではない ・(1)〜(7)の７つに、それぞれ利害得失があるという立場だ
