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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 12246 | . 2 ⊢ 9 = (8 + 1) | |
| 2 | 8re 12272 | . . 3 ⊢ 8 ∈ ℝ | |
| 3 | 1re 11140 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2, 3 | readdcli 11156 | . 2 ⊢ (8 + 1) ∈ ℝ |
| 5 | 1, 4 | eqeltri 2837 | 1 ⊢ 9 ∈ ℝ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2121 (class class class)co 7359 ℝcr 11033 1c1 11035 + caddc 11037 8c8 12237 9c9 12238 |
| 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 1975 ax-7 2016 ax-8 2123 ax-9 2131 ax-ext 2713 ax-1cn 11092 ax-icn 11093 ax-addcl 11094 ax-addrcl 11095 ax-mulcl 11096 ax-mulrcl 11097 ax-i2m1 11102 ax-1ne0 11103 ax-rrecex 11106 ax-cnre 11107 |
| This theorem depends on definitions: df-bi 209 df-an 398 df-or 855 df-3an 1095 df-tru 1551 df-fal 1561 df-ex 1788 df-sb 2075 df-clab 2720 df-cleq 2733 df-clel 2816 df-ne 2937 df-ral 3056 df-rex 3066 df-rab 3394 df-v 3435 df-dif 3887 df-un 3889 df-ss 3901 df-nul 4264 df-if 4457 df-sn 4558 df-pr 4560 df-op 4564 df-uni 4841 df-br 5075 df-iota 6444 df-fv 6496 df-ov 7362 df-2 12239 df-3 12240 df-4 12241 df-5 12242 df-6 12243 df-7 12244 df-8 12245 df-9 12246 |
| This theorem is referenced by: 7lt9 12371 6lt9 12372 5lt9 12373 4lt9 12374 3lt9 12375 2lt9 12376 1lt9 12377 10re 12658 9lt10 12770 8lt10 12771 0.999... 15841 cos2bnd 16150 sincos2sgn 16156 slotsdifplendx 17333 dsndxntsetndx 17351 unifndxntsetndx 17358 2logb9irr 26780 sqrt2cxp2logb9e3 26784 log2tlbnd 26930 bposlem4 27271 bposlem5 27272 bposlem7 27274 bposlem8 27275 bposlem9 27276 ex-fv 30533 dp2lt10 32964 hgt750lem 34845 hgt750lem2 34846 hgt750leme 34852 problem5 35910 60gcd7e1 42503 lcmineqlem23 42549 3lexlogpow5ineq1 42552 3lexlogpow5ineq2 42553 3lexlogpow5ineq4 42554 3lexlogpow5ineq3 42555 3lexlogpow2ineq2 42557 3lexlogpow5ineq5 42558 aks4d1lem1 42560 aks4d1p1 42574 aks4d1p6 42579 aks4d1p7d1 42580 aks4d1p7 42581 aks4d1p8 42585 9rp 42794 31prm 48087 2exp340mod341 48236 341fppr2 48237 9fppr8 48240 nfermltl8rev 48245 nfermltl2rev 48246 wtgoldbnnsum4prm 48305 bgoldbnnsum3prm 48307 bgoldbtbndlem1 48308 ackval42 49199 |
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