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Mirrors > Home > MPE Home > Th. List > 8re | Structured version Visualization version GIF version |
Description: The number 8 is real. (Contributed by NM, 27-May-1999.) |
Ref | Expression |
---|---|
8re | ⊢ 8 ∈ ℝ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-8 10962 | . 2 ⊢ 8 = (7 + 1) | |
2 | 7re 10980 | . . 3 ⊢ 7 ∈ ℝ | |
3 | 1re 9918 | . . 3 ⊢ 1 ∈ ℝ | |
4 | 2, 3 | readdcli 9932 | . 2 ⊢ (7 + 1) ∈ ℝ |
5 | 1, 4 | eqeltri 2684 | 1 ⊢ 8 ∈ ℝ |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 1977 (class class class)co 6549 ℝcr 9814 1c1 9816 + caddc 9818 7c7 10952 8c8 10953 |
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 |
This theorem is referenced by: 8cn 10983 9re 10984 9pos 10999 6lt8 11093 5lt8 11094 4lt8 11095 3lt8 11096 2lt8 11097 1lt8 11098 8lt9 11099 7lt9 11100 8lt10OLD 11108 7lt10OLD 11109 8th4div3 11129 8lt10 11550 7lt10 11551 ef01bndlem 14753 cos2bnd 14757 sralem 18998 chtub 24737 bposlem8 24816 bposlem9 24817 lgsdir2lem1 24850 lgsdir2lem4 24853 lgsdir2lem5 24854 2lgsoddprmlem1 24933 2lgsoddprmlem2 24934 chebbnd1lem2 24959 chebbnd1lem3 24960 chebbnd1 24961 pntlemf 25094 cchhllem 25567 fmtnoprmfac2lem1 40016 mod42tp1mod8 40057 nnsum3primesle9 40210 nnsum4primesoddALTV 40213 nnsum4primesevenALTV 40217 bgoldbtbndlem1 40221 tgoldbach 40232 tgoldbachOLD 40239 |
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