Titlebook: Blinde Flecken in der Mathematik; Eine explorative Stu Rebecca H?hr Book 2021 Der/die Herausgeber bzw. der/die Autor(en), exklusiv lizenzie

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Wayne T. Padgett,David V. AndersonLet . be any real number. By the ., in notation |.|, we mean . if . ≥ 0 and — . if . ≤ 0. If we picture . as a point on the number line, then |.| can be viewed as the distance between the points 0 and .. It is obvious that |? .| = |.|.

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