π相关论文
Diketopyrrolopyrrole based D-π-A-π-D type small organic molecules as hole transporting materials for
Three novel diketopyrrolopyrrole (DPP) based small organic molecules were synthesized as hole transporting materials for......
大家都知道,对于任意一个圆,它的周长与直径的比值是一个常数,人们把这个常数叫作圆周率,并用希腊文“圆周”的第一个字母π来表示......
圆周率π是一个历史悠久而又始终令人感兴趣的数学话题，迄今与它有关的各种文献总数超过4000篇，本书作者从中选取各类具有代表性的原......
本书是美国数学协会（MAA）的Carus数学丛书中的一本，据1956年初版本夏印，是超越数论的入门读物，用不多的篇幅、简洁的手法给出上世纪60年......
We show that the Hausdorff dimension of quasi-circles of polygonal mappings is one.Furthermore,we apply this result to t......
In 1981, Cohen constructed an infinite family of homotopy elements ζk∈π*(S) represented by h0bk∈ Ext3,2(p-1)(pk+1+1)......
...
...
