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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 10963 | . 2 ⊢ 9 = (8 + 1) | |
2 | 8re 10982 | . . 3 ⊢ 8 ∈ ℝ | |
3 | 1re 9918 | . . 3 ⊢ 1 ∈ ℝ | |
4 | 2, 3 | readdcli 9932 | . 2 ⊢ (8 + 1) ∈ ℝ |
5 | 1, 4 | eqeltri 2684 | 1 ⊢ 9 ∈ ℝ |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 1977 (class class class)co 6549 ℝcr 9814 1c1 9816 + caddc 9818 8c8 10953 9c9 10954 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-1cn 9873 ax-icn 9874 ax-addcl 9875 ax-addrcl 9876 ax-mulcl 9877 ax-mulrcl 9878 ax-i2m1 9883 ax-1ne0 9884 ax-rrecex 9887 ax-cnre 9888 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-ral 2901 df-rex 2902 df-rab 2905 df-v 3175 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-sn 4126 df-pr 4128 df-op 4132 df-uni 4373 df-br 4584 df-iota 5768 df-fv 5812 df-ov 6552 df-2 10956 df-3 10957 df-4 10958 df-5 10959 df-6 10960 df-7 10961 df-8 10962 df-9 10963 |
This theorem is referenced by: 9cn 10985 10reOLD 10986 10posOLD 11000 7lt9 11100 6lt9 11101 5lt9 11102 4lt9 11103 3lt9 11104 2lt9 11105 1lt9 11106 9lt10OLD 11107 8lt10OLD 11108 9lt10 11549 8lt10 11550 0.999... 14451 0.999...OLD 14452 cos2bnd 14757 sincos2sgn 14763 tuslem 21881 setsmsds 22091 tnglem 22254 tngds 22262 log2tlbnd 24472 bposlem4 24812 bposlem5 24813 bposlem7 24815 bposlem8 24816 bposlem9 24817 ex-fv 26692 problem5 30817 31prm 40050 wtgoldbnnsum4prm 40218 bgoldbnnsum3prm 40220 bgoldbtbndlem1 40221 |
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