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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 12305 | . 2 ⊢ 9 = (8 + 1) | |
| 2 | 8re 12332 | . . 3 ⊢ 8 ∈ ℝ | |
| 3 | 1re 11203 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2, 3 | readdcli 11219 | . 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 7410 ℝcr 11094 1c1 11096 + caddc 11098 8c8 12296 9c9 12297 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 ax-1cn 11153 ax-icn 11154 ax-addcl 11155 ax-addrcl 11156 ax-mulcl 11157 ax-mulrcl 11158 ax-i2m1 11163 ax-1ne0 11164 ax-rrecex 11167 ax-cnre 11168 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-ne 2959 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3908 df-un 3910 df-ss 3922 df-nul 4287 df-if 4488 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-br 5110 df-iota 6492 df-fv 6544 df-ov 7413 df-2 12298 df-3 12299 df-4 12300 df-5 12301 df-6 12302 df-7 12303 df-8 12304 df-9 12305 |
| This theorem is referenced by: 7lt9 12438 6lt9 12439 5lt9 12440 4lt9 12441 3lt9 12442 2lt9 12443 1lt9 12444 10re 12729 9lt10 12843 8lt10 12844 7lt10 12845 6lt10 12846 5lt10 12847 4lt10 12848 3lt10 12849 2lt10 12850 1lt10 12851 0.999... 15931 cos2bnd 16239 sincos2sgn 16245 slotsdifplendx 17423 dsndxntsetndx 17441 unifndxntsetndx 17448 2logb9irr 26960 sqrt2cxp2logb9e3 26964 log2tlbnd 27110 bposlem4 27451 bposlem5 27452 bposlem7 27454 bposlem8 27455 bposlem9 27456 ex-fv 30794 dp2lt10 33203 hgt750lem 35038 hgt750lem2 35039 hgt750leme 35045 problem5 36161 60gcd7e1 42792 lcmineqlem23 42838 3lexlogpow5ineq1 42841 3lexlogpow5ineq2 42842 3lexlogpow5ineq4 42843 3lexlogpow5ineq3 42844 3lexlogpow2ineq2 42846 3lexlogpow5ineq5 42847 aks4d1lem1 42849 aks4d1p1 42863 aks4d1p6 42868 aks4d1p7d1 42869 aks4d1p7 42870 aks4d1p8 42874 9rp 43085 31prm 48369 2exp340mod341 48518 341fppr2 48519 9fppr8 48522 nfermltl8rev 48527 nfermltl2rev 48528 wtgoldbnnsum4prm 48587 bgoldbnnsum3prm 48589 bgoldbtbndlem1 48590 ackval42 49496 |
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