【摘 要】
:
The theory of dessins denfants concentrates on the finite index subgroups of modular group.This talk is devoted to the study of much neglected infinite inde
【机 构】
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GalatasarayUniversity
【出 处】
:
Teichmuller与Grothendieck- Teichmuller理论研讨会
论文部分内容阅读
The theory of dessins denfants concentrates on the finite index subgroups of modular group.This talk is devoted to the study of much neglected infinite index subgroups.We will first focus on the number theoretical part of this theory which is related to the class number problems of Gauss.
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