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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 12217 | . 2 ⊢ 9 = (8 + 1) | |
| 2 | 8re 12243 | . . 3 ⊢ 8 ∈ ℝ | |
| 3 | 1re 11134 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2, 3 | readdcli 11149 | . 2 ⊢ (8 + 1) ∈ ℝ |
| 5 | 1, 4 | eqeltri 2832 | 1 ⊢ 9 ∈ ℝ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2113 (class class class)co 7358 ℝcr 11027 1c1 11029 + caddc 11031 8c8 12208 9c9 12209 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2708 ax-1cn 11086 ax-icn 11087 ax-addcl 11088 ax-addrcl 11089 ax-mulcl 11090 ax-mulrcl 11091 ax-i2m1 11096 ax-1ne0 11097 ax-rrecex 11100 ax-cnre 11101 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2715 df-cleq 2728 df-clel 2811 df-ne 2933 df-ral 3052 df-rex 3061 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-ss 3918 df-nul 4286 df-if 4480 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-br 5099 df-iota 6448 df-fv 6500 df-ov 7361 df-2 12210 df-3 12211 df-4 12212 df-5 12213 df-6 12214 df-7 12215 df-8 12216 df-9 12217 |
| This theorem is referenced by: 7lt9 12342 6lt9 12343 5lt9 12344 4lt9 12345 3lt9 12346 2lt9 12347 1lt9 12348 10re 12628 9lt10 12740 8lt10 12741 0.999... 15806 cos2bnd 16115 sincos2sgn 16121 slotsdifplendx 17297 dsndxntsetndx 17315 unifndxntsetndx 17322 2logb9irr 26763 sqrt2cxp2logb9e3 26767 log2tlbnd 26913 bposlem4 27256 bposlem5 27257 bposlem7 27259 bposlem8 27260 bposlem9 27261 ex-fv 30520 dp2lt10 32967 hgt750lem 34810 hgt750lem2 34811 hgt750leme 34817 problem5 35865 60gcd7e1 42281 lcmineqlem23 42327 3lexlogpow5ineq1 42330 3lexlogpow5ineq2 42331 3lexlogpow5ineq4 42332 3lexlogpow5ineq3 42333 3lexlogpow2ineq2 42335 3lexlogpow5ineq5 42336 aks4d1lem1 42338 aks4d1p1 42352 aks4d1p6 42357 aks4d1p7d1 42358 aks4d1p7 42359 aks4d1p8 42363 9rp 42580 31prm 47864 2exp340mod341 48000 341fppr2 48001 9fppr8 48004 nfermltl8rev 48009 nfermltl2rev 48010 wtgoldbnnsum4prm 48069 bgoldbnnsum3prm 48071 bgoldbtbndlem1 48072 ackval42 48963 |
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