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Mirrors > Home > ILE Home > Th. List > 7re | GIF version |
Description: The number 7 is real. (Contributed by NM, 27-May-1999.) |
Ref | Expression |
---|---|
7re | ⊢ 7 ∈ ℝ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-7 8808 | . 2 ⊢ 7 = (6 + 1) | |
2 | 6re 8825 | . . 3 ⊢ 6 ∈ ℝ | |
3 | 1re 7789 | . . 3 ⊢ 1 ∈ ℝ | |
4 | 2, 3 | readdcli 7803 | . 2 ⊢ (6 + 1) ∈ ℝ |
5 | 1, 4 | eqeltri 2213 | 1 ⊢ 7 ∈ ℝ |
Colors of variables: wff set class |
Syntax hints: ∈ wcel 1481 (class class class)co 5782 ℝcr 7643 1c1 7645 + caddc 7647 6c6 8799 7c7 8800 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-5 1424 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-4 1488 ax-17 1507 ax-ial 1515 ax-ext 2122 ax-1re 7738 ax-addrcl 7741 |
This theorem depends on definitions: df-bi 116 df-cleq 2133 df-clel 2136 df-2 8803 df-3 8804 df-4 8805 df-5 8806 df-6 8807 df-7 8808 |
This theorem is referenced by: 7cn 8828 8re 8829 8pos 8847 5lt7 8929 4lt7 8930 3lt7 8931 2lt7 8932 1lt7 8933 7lt8 8934 6lt8 8935 7lt9 8942 6lt9 8943 7lt10 9338 6lt10 9339 |
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