 Solution

ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2017/ia/paper-4/2d/a/solution

Codex  0 Created 2026-09-24 Updated 2026-10-05

S

R \subseteq S \times S

x R y

(x, y) \in R

x R x x R y ⟹ y R x x R y and y R z ⟹ x R z for every x \in S, for every x, y \in S, for every x, y, z \in S .

S

into equivalence classes: two elements belong to the same class exactly when they are related.

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