noun
Lie algebra
A mathematical structure used in the study of continuous symmetry; named after Sophus Lie.
リー代数は物理学の対称性の記述に用いられる。
Lie algebras are used to describe symmetries in physics.
A Lie group is a smooth manifold that is also a group; its tangent space at the identity forms a Lie algebra.
From the name of Norwegian mathematician Sophus Lie, combined with 代数 (algebra).