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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 12227 | . 2 ⊢ 9 = (8 + 1) | |
| 2 | 8re 12253 | . . 3 ⊢ 8 ∈ ℝ | |
| 3 | 1re 11144 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2, 3 | readdcli 11159 | . 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 7368 ℝcr 11037 1c1 11039 + caddc 11041 8c8 12218 9c9 12219 |
| 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 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 2716 df-cleq 2729 df-clel 2812 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-ss 3920 df-nul 4288 df-if 4482 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-iota 6456 df-fv 6508 df-ov 7371 df-2 12220 df-3 12221 df-4 12222 df-5 12223 df-6 12224 df-7 12225 df-8 12226 df-9 12227 |
| This theorem is referenced by: 7lt9 12352 6lt9 12353 5lt9 12354 4lt9 12355 3lt9 12356 2lt9 12357 1lt9 12358 10re 12638 9lt10 12750 8lt10 12751 0.999... 15816 cos2bnd 16125 sincos2sgn 16131 slotsdifplendx 17307 dsndxntsetndx 17325 unifndxntsetndx 17332 2logb9irr 26776 sqrt2cxp2logb9e3 26780 log2tlbnd 26926 bposlem4 27269 bposlem5 27270 bposlem7 27272 bposlem8 27273 bposlem9 27274 ex-fv 30534 dp2lt10 32980 hgt750lem 34833 hgt750lem2 34834 hgt750leme 34840 problem5 35889 60gcd7e1 42379 lcmineqlem23 42425 3lexlogpow5ineq1 42428 3lexlogpow5ineq2 42429 3lexlogpow5ineq4 42430 3lexlogpow5ineq3 42431 3lexlogpow2ineq2 42433 3lexlogpow5ineq5 42434 aks4d1lem1 42436 aks4d1p1 42450 aks4d1p6 42455 aks4d1p7d1 42456 aks4d1p7 42457 aks4d1p8 42461 9rp 42678 31prm 47961 2exp340mod341 48097 341fppr2 48098 9fppr8 48101 nfermltl8rev 48106 nfermltl2rev 48107 wtgoldbnnsum4prm 48166 bgoldbnnsum3prm 48168 bgoldbtbndlem1 48169 ackval42 49060 |
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