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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 12243 | . 2 ⊢ 9 = (8 + 1) | |
| 2 | 8re 12269 | . . 3 ⊢ 8 ∈ ℝ | |
| 3 | 1re 11136 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2, 3 | readdcli 11152 | . 2 ⊢ (8 + 1) ∈ ℝ |
| 5 | 1, 4 | eqeltri 2835 | 1 ⊢ 9 ∈ ℝ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2119 (class class class)co 7357 ℝcr 11029 1c1 11031 + caddc 11033 8c8 12234 9c9 12235 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-ext 2711 ax-1cn 11088 ax-icn 11089 ax-addcl 11090 ax-addrcl 11091 ax-mulcl 11092 ax-mulrcl 11093 ax-i2m1 11098 ax-1ne0 11099 ax-rrecex 11102 ax-cnre 11103 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-sb 2074 df-clab 2718 df-cleq 2731 df-clel 2814 df-ne 2935 df-ral 3054 df-rex 3064 df-rab 3392 df-v 3433 df-dif 3886 df-un 3888 df-ss 3900 df-nul 4263 df-if 4456 df-sn 4557 df-pr 4559 df-op 4563 df-uni 4840 df-br 5074 df-iota 6442 df-fv 6494 df-ov 7360 df-2 12236 df-3 12237 df-4 12238 df-5 12239 df-6 12240 df-7 12241 df-8 12242 df-9 12243 |
| This theorem is referenced by: 7lt9 12368 6lt9 12369 5lt9 12370 4lt9 12371 3lt9 12372 2lt9 12373 1lt9 12374 10re 12655 9lt10 12767 8lt10 12768 0.999... 15838 cos2bnd 16147 sincos2sgn 16153 slotsdifplendx 17330 dsndxntsetndx 17348 unifndxntsetndx 17355 2logb9irr 26778 sqrt2cxp2logb9e3 26782 log2tlbnd 26928 bposlem4 27269 bposlem5 27270 bposlem7 27272 bposlem8 27273 bposlem9 27274 ex-fv 30532 dp2lt10 32963 hgt750lem 34844 hgt750lem2 34845 hgt750leme 34851 problem5 35906 60gcd7e1 42499 lcmineqlem23 42545 3lexlogpow5ineq1 42548 3lexlogpow5ineq2 42549 3lexlogpow5ineq4 42550 3lexlogpow5ineq3 42551 3lexlogpow2ineq2 42553 3lexlogpow5ineq5 42554 aks4d1lem1 42556 aks4d1p1 42570 aks4d1p6 42575 aks4d1p7d1 42576 aks4d1p7 42577 aks4d1p8 42581 9rp 42790 31prm 48083 2exp340mod341 48232 341fppr2 48233 9fppr8 48236 nfermltl8rev 48241 nfermltl2rev 48242 wtgoldbnnsum4prm 48301 bgoldbnnsum3prm 48303 bgoldbtbndlem1 48304 ackval42 49195 |
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