Orthogonal Asymptotic Lines on Surfaces Immersed in $\mathbf R ^4$
英文摘要：
In this paper we study some properties of surfaces immersed in $\mathbf R ^4$ whose asymptotic lines are orthogonal. We also analyze necessary and sufficient conditions for the hypersphericity of surfaces in $\mathbf R ^4$.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
