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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 9194 | . 2 ⊢ 4 = (3 + 1) | |
| 2 | 3re 9207 | . . 3 ⊢ 3 ∈ ℝ | |
| 3 | 1re 8168 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2, 3 | readdcli 8182 | . 2 ⊢ (3 + 1) ∈ ℝ |
| 5 | 1, 4 | eqeltri 2302 | 1 ⊢ 4 ∈ ℝ |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2200 (class class class)co 6013 ℝcr 8021 1c1 8023 + caddc 8025 3c3 9185 4c4 9186 |
| 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 1493 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-4 1556 ax-17 1572 ax-ial 1580 ax-ext 2211 ax-1re 8116 ax-addrcl 8119 |
| This theorem depends on definitions: df-bi 117 df-cleq 2222 df-clel 2225 df-2 9192 df-3 9193 df-4 9194 |
| This theorem is referenced by: 4cn 9211 5re 9212 4ne0 9231 4ap0 9232 5pos 9233 2lt4 9307 1lt4 9308 4lt5 9309 3lt5 9310 2lt5 9311 1lt5 9312 4lt6 9314 3lt6 9315 4lt7 9320 3lt7 9321 4lt8 9327 3lt8 9328 4lt9 9335 3lt9 9336 8th4div3 9353 div4p1lem1div2 9388 4lt10 9736 3lt10 9737 uzuzle24 9787 uzuzle34 9788 eluz4eluz2 9792 fz0to4untppr 10349 fzo0to42pr 10455 fldiv4p1lem1div2 10555 faclbnd2 10994 4bc2eq6 11026 resqrexlemover 11561 resqrexlemcalc1 11565 resqrexlemcalc2 11566 resqrexlemcalc3 11567 resqrexlemnm 11569 resqrexlemga 11574 sqrt2gt1lt2 11600 amgm2 11669 ef01bndlem 12307 sin01bnd 12308 cos01bnd 12309 cos2bnd 12311 flodddiv4 12487 4sqlem12 12965 tsetndxnstarvndx 13267 slotsdifplendx 13283 slotsdifdsndx 13298 slotsdifunifndx 13305 dveflem 15440 sin0pilem2 15496 sinhalfpilem 15505 sincosq1lem 15539 coseq0negpitopi 15550 tangtx 15552 sincos4thpi 15554 pigt3 15558 gausslemma2dlem0d 15771 gausslemma2dlem3 15782 gausslemma2dlem4 15783 |
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