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| Mirrors > Home > ILE Home > Th. List > 4re | GIF version | ||
| Description: The number 4 is real. (Contributed by NM, 27-May-1999.) |
| Ref | Expression |
|---|---|
| 4re | ⊢ 4 ∈ ℝ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-4 9315 | . 2 ⊢ 4 = (3 + 1) | |
| 2 | 3re 9328 | . . 3 ⊢ 3 ∈ ℝ | |
| 3 | 1re 8289 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2, 3 | readdcli 8303 | . 2 ⊢ (3 + 1) ∈ ℝ |
| 5 | 1, 4 | eqeltri 2307 | 1 ⊢ 4 ∈ ℝ |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2205 (class class class)co 6058 ℝcr 8142 1c1 8144 + caddc 8146 3c3 9306 4c4 9307 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1496 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-4 1559 ax-17 1575 ax-ial 1583 ax-ext 2216 ax-1re 8237 ax-addrcl 8240 |
| This theorem depends on definitions: df-bi 117 df-cleq 2227 df-clel 2230 df-2 9313 df-3 9314 df-4 9315 |
| This theorem is referenced by: 4cn 9332 5re 9333 4ne0 9352 4ap0 9353 5pos 9354 2lt4 9428 1lt4 9429 4lt5 9430 3lt5 9431 2lt5 9432 1lt5 9433 4lt6 9435 3lt6 9436 4lt7 9441 3lt7 9442 4lt8 9448 3lt8 9449 4lt9 9456 3lt9 9457 8th4div3 9474 div4p1lem1div2 9509 4lt10 9862 3lt10 9863 uzuzle24 9913 uzuzle34 9914 eluz4eluz2 9918 fz0to4untppr 10480 fzo0to42pr 10587 fldiv4p1lem1div2 10689 faclbnd2 11129 4bc2eq6 11162 resqrexlemover 11720 resqrexlemcalc1 11724 resqrexlemcalc2 11725 resqrexlemcalc3 11726 resqrexlemnm 11728 resqrexlemga 11733 sqrt2gt1lt2 11759 amgm2 11828 ef01bndlem 12467 sin01bnd 12468 cos01bnd 12469 cos2bnd 12471 flodddiv4 12647 4sqlem12 13125 tsetndxnstarvndx 13491 slotsdifplendx 13507 slotsdifdsndx 13522 slotsdifunifndx 13529 dveflem 15717 sin0pilem2 15773 sinhalfpilem 15782 sincosq1lem 15816 coseq0negpitopi 15827 tangtx 15829 sincos4thpi 15831 pigt3 15835 gausslemma2dlem0d 16051 gausslemma2dlem3 16062 gausslemma2dlem4 16063 |
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