Given a diffeomorphism which is homotopic to the identity from the [Formula: see text]-torus to itself, we construct an isotopy whose norm is controlled by that of the diffeomorphism in question.

中文翻译：

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连接同伦微分同胚需要多大的同位素（𝕋2）

给定一个微分同胚，它与 [公式：见文本]-环面到自身的恒等式同伦，我们构造了一个同位素，其范数由所讨论的微分同胚的范数控制。