We show that non-obtuse trapezoids are uniquely determined by their Dirichlet Laplace spectrum. This extends our previous result [Hezari et al., Ann. Henri Poincare 18(12), 3759–3792 (2017)], which was only concerned with the Neumann Laplace spectrum.

中文翻译：

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梯形的狄利克雷等谱问题

我们表明非钝梯形由其狄利克雷拉普拉斯光谱唯一确定。这扩展了我们之前的结果 [Hezari et al. ，安。Henri Poincare 18 (12), 3759–3792 (2017)]，只关注诺依曼拉普拉斯谱。