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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 12288 | . 2 ⊢ 9 = (8 + 1) | |
| 2 | 8re 12315 | . . 3 ⊢ 8 ∈ ℝ | |
| 3 | 1re 11182 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2, 3 | readdcli 11198 | . 2 ⊢ (8 + 1) ∈ ℝ |
| 5 | 1, 4 | eqeltri 2859 | 1 ⊢ 9 ∈ ℝ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2143 (class class class)co 7397 ℝcr 11073 1c1 11075 + caddc 11077 8c8 12279 9c9 12280 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1816 ax-4 1830 ax-5 1931 ax-6 1988 ax-7 2029 ax-8 2145 ax-9 2153 ax-ext 2735 ax-1cn 11132 ax-icn 11133 ax-addcl 11134 ax-addrcl 11135 ax-mulcl 11136 ax-mulrcl 11137 ax-i2m1 11142 ax-1ne0 11143 ax-rrecex 11146 ax-cnre 11147 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1101 df-tru 1564 df-fal 1574 df-ex 1801 df-sb 2092 df-clab 2742 df-cleq 2755 df-clel 2838 df-ne 2959 df-ral 3078 df-rex 3088 df-rab 3416 df-v 3457 df-dif 3908 df-un 3910 df-ss 3922 df-nul 4287 df-if 4482 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-br 5102 df-iota 6478 df-fv 6530 df-ov 7400 df-2 12281 df-3 12282 df-4 12283 df-5 12284 df-6 12285 df-7 12286 df-8 12287 df-9 12288 |
| This theorem is referenced by: 7lt9 12421 6lt9 12422 5lt9 12423 4lt9 12424 3lt9 12425 2lt9 12426 1lt9 12427 10re 12712 9lt10 12826 8lt10 12827 7lt10 12828 6lt10 12829 5lt10 12830 4lt10 12831 3lt10 12832 2lt10 12833 1lt10 12834 0.999... 15912 cos2bnd 16221 sincos2sgn 16227 slotsdifplendx 17405 dsndxntsetndx 17423 unifndxntsetndx 17430 2logb9irr 26861 sqrt2cxp2logb9e3 26865 log2tlbnd 27011 bposlem4 27352 bposlem5 27353 bposlem7 27355 bposlem8 27356 bposlem9 27357 ex-fv 30646 dp2lt10 33062 hgt750lem 34946 hgt750lem2 34947 hgt750leme 34953 problem5 36020 60gcd7e1 42623 lcmineqlem23 42669 3lexlogpow5ineq1 42672 3lexlogpow5ineq2 42673 3lexlogpow5ineq4 42674 3lexlogpow5ineq3 42675 3lexlogpow2ineq2 42677 3lexlogpow5ineq5 42678 aks4d1lem1 42680 aks4d1p1 42694 aks4d1p6 42699 aks4d1p7d1 42700 aks4d1p7 42701 aks4d1p8 42705 9rp 42914 31prm 48207 2exp340mod341 48356 341fppr2 48357 9fppr8 48360 nfermltl8rev 48365 nfermltl2rev 48366 wtgoldbnnsum4prm 48425 bgoldbnnsum3prm 48427 bgoldbtbndlem1 48428 ackval42 49319 |
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