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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 12251 | . 2 ⊢ 9 = (8 + 1) | |
| 2 | 8re 12277 | . . 3 ⊢ 8 ∈ ℝ | |
| 3 | 1re 11144 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2, 3 | readdcli 11160 | . 2 ⊢ (8 + 1) ∈ ℝ |
| 5 | 1, 4 | eqeltri 2832 | 1 ⊢ 9 ∈ ℝ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2114 (class class class)co 7367 ℝcr 11037 1c1 11039 + caddc 11041 8c8 12242 9c9 12243 |
| 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 2708 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-i2m1 11106 ax-1ne0 11107 ax-rrecex 11110 ax-cnre 11111 |
| 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 2715 df-cleq 2728 df-clel 2811 df-ne 2933 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-ss 3906 df-nul 4274 df-if 4467 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-br 5086 df-iota 6454 df-fv 6506 df-ov 7370 df-2 12244 df-3 12245 df-4 12246 df-5 12247 df-6 12248 df-7 12249 df-8 12250 df-9 12251 |
| This theorem is referenced by: 7lt9 12376 6lt9 12377 5lt9 12378 4lt9 12379 3lt9 12380 2lt9 12381 1lt9 12382 10re 12663 9lt10 12775 8lt10 12776 0.999... 15846 cos2bnd 16155 sincos2sgn 16161 slotsdifplendx 17338 dsndxntsetndx 17356 unifndxntsetndx 17363 2logb9irr 26759 sqrt2cxp2logb9e3 26763 log2tlbnd 26909 bposlem4 27250 bposlem5 27251 bposlem7 27253 bposlem8 27254 bposlem9 27255 ex-fv 30513 dp2lt10 32943 hgt750lem 34795 hgt750lem2 34796 hgt750leme 34802 problem5 35851 60gcd7e1 42444 lcmineqlem23 42490 3lexlogpow5ineq1 42493 3lexlogpow5ineq2 42494 3lexlogpow5ineq4 42495 3lexlogpow5ineq3 42496 3lexlogpow2ineq2 42498 3lexlogpow5ineq5 42499 aks4d1lem1 42501 aks4d1p1 42515 aks4d1p6 42520 aks4d1p7d1 42521 aks4d1p7 42522 aks4d1p8 42526 9rp 42736 31prm 48060 2exp340mod341 48209 341fppr2 48210 9fppr8 48213 nfermltl8rev 48218 nfermltl2rev 48219 wtgoldbnnsum4prm 48278 bgoldbnnsum3prm 48280 bgoldbtbndlem1 48281 ackval42 49172 |
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