8 ?# A8 P. R( }3 I3 E) L) p$ k" O6 y9 t f8 e* z4 w
the rational numbers 3 p5 A) B4 Y- ]2 z
the real algebraic numbers 8 T9 F$ j# U+ S5 [the computable numbers q4 S1 s' V1 j v
the real numbers ( [( y! _ F; ~+ M
the field of real # @; `8 k) x5 }3 Q& D0 f; q" t
real closed fields + e. ?+ S1 `; c& | Z/ f# k% m% d) h0 B
superreal numbers - m: t% |5 P& l% e2 r& xhyperreal numbers ; @ A+ G. X8 w