挪威数学家， 以丢番图近似(Diophantine approximation)与组合数学方面的贡献而闻名。他在1914年发表了词法问题或图厄问题， 这和停机问题密切相关。
爱尔兰的西部海岸者大多有悬崖，小山和低山 (以 1,041 m 的 卡朗图厄尔山（Carrauntoohil）为最高点) 。
The west-coast of Ireland mostly consists of cliffs, hills and low mountains (the highest point being Carrauntoohil at 1,041 m).
圭亚那中部之河流，流程约为161公里(即100英里)。河中含金，并以其凯厄图尔瀑布闻名。
A river, about 161 km (100 mi) long, of central Guyana. It has gold deposits and is known for its Kaieteur Falls.
基于格雷厄姆扫描算法提出声谱图包络主波提取的新方法，并用改进的角度探测方法进行包络特征的识别。
A novel method based on the Graham scan is proposed to extract the chief wave of the spectrogram envelop, while an improved Angle detection method is applied to recognize the features.
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