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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 12310 | . 2 ⊢ 9 = (8 + 1) | |
| 2 | 8re 12337 | . . 3 ⊢ 8 ∈ ℝ | |
| 3 | 1re 11208 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2, 3 | readdcli 11224 | . 2 ⊢ (8 + 1) ∈ ℝ |
| 5 | 1, 4 | eqeltri 2865 | 1 ⊢ 9 ∈ ℝ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2149 (class class class)co 7411 ℝcr 11099 1c1 11101 + caddc 11103 8c8 12301 9c9 12302 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-ext 2741 ax-1cn 11158 ax-icn 11159 ax-addcl 11160 ax-addrcl 11161 ax-mulcl 11162 ax-mulrcl 11163 ax-i2m1 11168 ax-1ne0 11169 ax-rrecex 11172 ax-cnre 11173 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-sb 2098 df-clab 2748 df-cleq 2761 df-clel 2844 df-ne 2965 df-ral 3086 df-rex 3096 df-rab 3424 df-v 3465 df-dif 3916 df-un 3918 df-ss 3930 df-nul 4295 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-br 5114 df-iota 6493 df-fv 6545 df-ov 7414 df-2 12303 df-3 12304 df-4 12305 df-5 12306 df-6 12307 df-7 12308 df-8 12309 df-9 12310 |
| This theorem is referenced by: 7lt9 12443 6lt9 12444 5lt9 12445 4lt9 12446 3lt9 12447 2lt9 12448 1lt9 12449 10re 12734 9lt10 12848 8lt10 12849 7lt10 12850 6lt10 12851 5lt10 12852 4lt10 12853 3lt10 12854 2lt10 12855 1lt10 12856 0.999... 15935 cos2bnd 16244 sincos2sgn 16250 slotsdifplendx 17428 dsndxntsetndx 17446 unifndxntsetndx 17453 2logb9irr 26926 sqrt2cxp2logb9e3 26930 log2tlbnd 27076 bposlem4 27417 bposlem5 27418 bposlem7 27420 bposlem8 27421 bposlem9 27422 ex-fv 30735 dp2lt10 33144 hgt750lem 34983 hgt750lem2 34984 hgt750leme 34990 problem5 36094 60gcd7e1 42696 lcmineqlem23 42742 3lexlogpow5ineq1 42745 3lexlogpow5ineq2 42746 3lexlogpow5ineq4 42747 3lexlogpow5ineq3 42748 3lexlogpow2ineq2 42750 3lexlogpow5ineq5 42751 aks4d1lem1 42753 aks4d1p1 42767 aks4d1p6 42772 aks4d1p7d1 42773 aks4d1p7 42774 aks4d1p8 42778 9rp 42989 31prm 48272 2exp340mod341 48421 341fppr2 48422 9fppr8 48425 nfermltl8rev 48430 nfermltl2rev 48431 wtgoldbnnsum4prm 48490 bgoldbnnsum3prm 48492 bgoldbtbndlem1 48493 ackval42 49395 |
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