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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 11865 | . 2 ⊢ 9 = (8 + 1) | |
2 | 8re 11891 | . . 3 ⊢ 8 ∈ ℝ | |
3 | 1re 10798 | . . 3 ⊢ 1 ∈ ℝ | |
4 | 2, 3 | readdcli 10813 | . 2 ⊢ (8 + 1) ∈ ℝ |
5 | 1, 4 | eqeltri 2827 | 1 ⊢ 9 ∈ ℝ |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2112 (class class class)co 7191 ℝcr 10693 1c1 10695 + caddc 10697 8c8 11856 9c9 11857 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2018 ax-8 2114 ax-9 2122 ax-ext 2708 ax-1cn 10752 ax-icn 10753 ax-addcl 10754 ax-addrcl 10755 ax-mulcl 10756 ax-mulrcl 10757 ax-i2m1 10762 ax-1ne0 10763 ax-rrecex 10766 ax-cnre 10767 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-sb 2073 df-clab 2715 df-cleq 2728 df-clel 2809 df-ne 2933 df-ral 3056 df-rex 3057 df-rab 3060 df-v 3400 df-dif 3856 df-un 3858 df-in 3860 df-ss 3870 df-nul 4224 df-if 4426 df-sn 4528 df-pr 4530 df-op 4534 df-uni 4806 df-br 5040 df-iota 6316 df-fv 6366 df-ov 7194 df-2 11858 df-3 11859 df-4 11860 df-5 11861 df-6 11862 df-7 11863 df-8 11864 df-9 11865 |
This theorem is referenced by: 7lt9 11995 6lt9 11996 5lt9 11997 4lt9 11998 3lt9 11999 2lt9 12000 1lt9 12001 10re 12277 9lt10 12389 8lt10 12390 0.999... 15408 cos2bnd 15712 sincos2sgn 15718 cnfldfun 20329 tuslem 23118 setsmsds 23328 tnglem 23492 tngds 23500 2logb9irr 25632 sqrt2cxp2logb9e3 25636 log2tlbnd 25782 bposlem4 26122 bposlem5 26123 bposlem7 26125 bposlem8 26126 bposlem9 26127 ex-fv 28480 dp2lt10 30832 hgt750lem 32297 hgt750lem2 32298 hgt750leme 32304 problem5 33294 60gcd7e1 39696 lcmineqlem23 39742 3lexlogpow5ineq1 39745 3lexlogpow5ineq2 39746 3lexlogpow5ineq4 39747 3lexlogpow5ineq3 39748 3lexlogpow2ineq2 39750 3lexlogpow5ineq5 39751 aks4d1p1 39766 31prm 44665 2exp340mod341 44801 341fppr2 44802 9fppr8 44805 nfermltl8rev 44810 nfermltl2rev 44811 wtgoldbnnsum4prm 44870 bgoldbnnsum3prm 44872 bgoldbtbndlem1 44873 ackval42 45658 |
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