NIL测地三角形及其内角和
NIL geodesic triangles and their interior angle sums
摘要:
本文研究了$\NIL$几何中测地三角形的内角和,证明了它可以大于、等于或小于$π$ .我们使用E. {Moln在\cite{M97}中。
英文摘要:
In this paper we study the interior angle sums of geodesic triangles in $\NIL$ geometry and prove that it can be larger, equal or less than $π$. We use for the computations the projective model of $\NIL$ introduced by E. {Molnár} in \cite{M97}.
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