@article{oai:osu.repo.nii.ac.jp:00002458,
 author = {伊藤, 誠 and ITOH, Makoto},
 issue = {2},
 journal = {大阪産業大学経済論集, OSAKA SANGYO UNIVERSITY JOURNAL OF ECONOMICS},
 month = {Mar},
 note = {The curvature tensor of 4-dimensional spacetime, which appears in general relativity, is difficult to understand because it is a complex tensor with four subscripts. Since it is impossible to visualize geodesics and curvatures in 4-dimensional spacetime, we visualized geodesics and calculate curvature tensors of 2-dimensional surfaces, which corresponds to a 2-dimensional Riemann plane in 3-dimensional Euclidean space in order to understand the meanings of geodesics and curvature tensors. For the visualization and the calculation, we used SageMath, which is a free computer algebra system software. We found that the visualization of these geodesics and the calculation of curvatures on a 2-dimensional surface in 3-dimensional Euclidean space is useful for understanding their meanings. The usefulness of SageMath is also clarified.},
 pages = {1--17},
 title = {測地線・曲率テンソルとSageMath},
 volume = {23},
 year = {2022},
 yomi = {イトウ, マコト}
}