🌐EnglishEnglishDeutschEspañolFrançaisPortuguêsРусскийالعربية中文日本語EntityQ681406· pop 13· linked from 69 articlesEuler's rotation theoremtheoremConnectionscomplex numberEntityeigenvectors and eigenvaluesEntityCategoriesEuclidean symmetriesLeonhard EulerRotation in three dimensionsTheorems in geometry