中文摘要：

讨论由一个拟对称同胚诱导出的广义调和共轭算子，并讨论它与极值拟共形延拓的关系．

英文摘要：

This paper deals with the generalized harmonic conjugation operator on the real-valued harmonic Dirichlet space by a quasisymmetric homeomorphism, and its relation to extremal quasiconformal extension.