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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 12245 | . 2 ⊢ 9 = (8 + 1) | |
| 2 | 8re 12271 | . . 3 ⊢ 8 ∈ ℝ | |
| 3 | 1re 11138 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2, 3 | readdcli 11154 | . 2 ⊢ (8 + 1) ∈ ℝ |
| 5 | 1, 4 | eqeltri 2833 | 1 ⊢ 9 ∈ ℝ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2114 (class class class)co 7361 ℝcr 11031 1c1 11033 + caddc 11035 8c8 12236 9c9 12237 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2709 ax-1cn 11090 ax-icn 11091 ax-addcl 11092 ax-addrcl 11093 ax-mulcl 11094 ax-mulrcl 11095 ax-i2m1 11100 ax-1ne0 11101 ax-rrecex 11104 ax-cnre 11105 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-dif 3893 df-un 3895 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-iota 6449 df-fv 6501 df-ov 7364 df-2 12238 df-3 12239 df-4 12240 df-5 12241 df-6 12242 df-7 12243 df-8 12244 df-9 12245 |
| This theorem is referenced by: 7lt9 12370 6lt9 12371 5lt9 12372 4lt9 12373 3lt9 12374 2lt9 12375 1lt9 12376 10re 12657 9lt10 12769 8lt10 12770 0.999... 15840 cos2bnd 16149 sincos2sgn 16155 slotsdifplendx 17332 dsndxntsetndx 17350 unifndxntsetndx 17357 2logb9irr 26775 sqrt2cxp2logb9e3 26779 log2tlbnd 26925 bposlem4 27267 bposlem5 27268 bposlem7 27270 bposlem8 27271 bposlem9 27272 ex-fv 30531 dp2lt10 32961 hgt750lem 34814 hgt750lem2 34815 hgt750leme 34821 problem5 35870 60gcd7e1 42461 lcmineqlem23 42507 3lexlogpow5ineq1 42510 3lexlogpow5ineq2 42511 3lexlogpow5ineq4 42512 3lexlogpow5ineq3 42513 3lexlogpow2ineq2 42515 3lexlogpow5ineq5 42516 aks4d1lem1 42518 aks4d1p1 42532 aks4d1p6 42537 aks4d1p7d1 42538 aks4d1p7 42539 aks4d1p8 42543 9rp 42753 31prm 48075 2exp340mod341 48224 341fppr2 48225 9fppr8 48228 nfermltl8rev 48233 nfermltl2rev 48234 wtgoldbnnsum4prm 48293 bgoldbnnsum3prm 48295 bgoldbtbndlem1 48296 ackval42 49187 |
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