主しゅ系けい列れつ

noun

main sequence

In astronomy, the band on the Hertzsprung–Russell diagram where most stars lie, fusing hydrogen in their cores.

• 太たい陽ようは主しゅ系けい列れつ星せいの一ひとつです。

  The Sun is a main-sequence star.

noun

principal series

In physics and mathematics, a principal series representation or related concept; a technical term used in group theory and spectral analysis.

• この群ぐんの主しゅ系けい列れつ表ひょう現げんについて研けん究きゅうしている。

  I am researching the principal series representations of this group.