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Mirrors > Home > MPE Home > Th. List > 9re | Structured version Visualization version GIF version |
Description: The number 9 is real. (Contributed by NM, 27-May-1999.) |
Ref | Expression |
---|---|
9re | ⊢ 9 ∈ ℝ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-9 11710 | . 2 ⊢ 9 = (8 + 1) | |
2 | 8re 11736 | . . 3 ⊢ 8 ∈ ℝ | |
3 | 1re 10643 | . . 3 ⊢ 1 ∈ ℝ | |
4 | 2, 3 | readdcli 10658 | . 2 ⊢ (8 + 1) ∈ ℝ |
5 | 1, 4 | eqeltri 2911 | 1 ⊢ 9 ∈ ℝ |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2114 (class class class)co 7158 ℝcr 10538 1c1 10540 + caddc 10542 8c8 11701 9c9 11702 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-1cn 10597 ax-icn 10598 ax-addcl 10599 ax-addrcl 10600 ax-mulcl 10601 ax-mulrcl 10602 ax-i2m1 10607 ax-1ne0 10608 ax-rrecex 10611 ax-cnre 10612 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-ral 3145 df-rex 3146 df-rab 3149 df-v 3498 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-nul 4294 df-if 4470 df-sn 4570 df-pr 4572 df-op 4576 df-uni 4841 df-br 5069 df-iota 6316 df-fv 6365 df-ov 7161 df-2 11703 df-3 11704 df-4 11705 df-5 11706 df-6 11707 df-7 11708 df-8 11709 df-9 11710 |
This theorem is referenced by: 7lt9 11840 6lt9 11841 5lt9 11842 4lt9 11843 3lt9 11844 2lt9 11845 1lt9 11846 10re 12120 9lt10 12232 8lt10 12233 0.999... 15239 cos2bnd 15543 sincos2sgn 15549 cnfldfun 20559 tuslem 22878 setsmsds 23088 tnglem 23251 tngds 23259 2logb9irr 25375 sqrt2cxp2logb9e3 25379 log2tlbnd 25525 bposlem4 25865 bposlem5 25866 bposlem7 25868 bposlem8 25869 bposlem9 25870 ex-fv 28224 dp2lt10 30562 hgt750lem 31924 hgt750lem2 31925 hgt750leme 31931 problem5 32914 31prm 43767 2exp340mod341 43905 341fppr2 43906 9fppr8 43909 nfermltl8rev 43914 nfermltl2rev 43915 wtgoldbnnsum4prm 43974 bgoldbnnsum3prm 43976 bgoldbtbndlem1 43977 |
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