orthant

Noun

 * 1)  A n-dimensional generalization of the quadrant (in two-dimensional Cartesian space) and octant (in three-dimensional space).
 * 2) * 1992, Hal R. Varian, Microeconomic Analysis (3rd ed.), Norton, p. 114
 * Consider preferences defined over the nonnegative orthant by $$(x_1, x_2) \succ (y_1, y_2)$$ if $$x_1 + x_2 < y_1 + y_2$$ [&hellip;]