classification method, classification system

direction / area, district / field of study, line of work

(mathematics) commutative law

(mathematics) distributive law

A statement that is true under specified conditions; law.

policy, course, plan / synonym of 磁針 (jishin, “magnetic needle”)

a dialect; a provincialism

openness, not being closed / openness, allowing free entry and exit / openness, frankness

(calculus) calculus of variations - The form of calculus that deals with the maxima and minima of definite integrals of functions of many variables

a unit of area (1cm × 1cm), symbol cm², (UK) square centimetre, (US) square centimeter.