Articles

A NEW PROOF OF THE DELTA INEQUALITY

  • Yi QI ,
  • Fei SONG
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  • School of Mathematics and Systems Science, Beihang University, Beijing 100191, China

Received date: 2013-11-18

  Online published: 2015-09-01

Supported by

The research is partially supported by the National Natural Science Foundation of China (10971008 and 11371045).

Abstract

The purpose of this paper is to give a relatively elementary and direct proof of the Delta Inequality, which plays a very important role in the study of the extremal problem of quasiconformal mappings.

Cite this article

Yi QI , Fei SONG . A NEW PROOF OF THE DELTA INEQUALITY[J]. Acta mathematica scientia, Series B, 2015 , 35(5) : 1137 -1141 . DOI: 10.1016/S0252-9602(15)30045-X

References

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