↩ 🔵 🔵 🔵 ❪✺₄❫ Algebraic Sets ○ ❪✺_❫ Algebraic Subs ○ ❪✺_ₛₛ❫ Mathematical Subsets ○ ❪✺_ₛₛ❫ Linear Subsets ○ ❪✺_ₜₛ❫ Algebraic Typesets ○