Geometric theorems which can be proved without reference to the parallel postulate. Hence results of neutral geometry are true of both Euclidean geometry and non-Euclidean geometry. Also known as absolute geometry.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。