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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 9246 | . 2 ⊢ 4 = (3 + 1) | |
| 2 | 3re 9259 | . . 3 ⊢ 3 ∈ ℝ | |
| 3 | 1re 8221 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2, 3 | readdcli 8235 | . 2 ⊢ (3 + 1) ∈ ℝ |
| 5 | 1, 4 | eqeltri 2304 | 1 ⊢ 4 ∈ ℝ |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2202 (class class class)co 6028 ℝcr 8074 1c1 8076 + caddc 8078 3c3 9237 4c4 9238 |
| 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 2213 ax-1re 8169 ax-addrcl 8172 |
| This theorem depends on definitions: df-bi 117 df-cleq 2224 df-clel 2227 df-2 9244 df-3 9245 df-4 9246 |
| This theorem is referenced by: 4cn 9263 5re 9264 4ne0 9283 4ap0 9284 5pos 9285 2lt4 9359 1lt4 9360 4lt5 9361 3lt5 9362 2lt5 9363 1lt5 9364 4lt6 9366 3lt6 9367 4lt7 9372 3lt7 9373 4lt8 9379 3lt8 9380 4lt9 9387 3lt9 9388 8th4div3 9405 div4p1lem1div2 9440 4lt10 9790 3lt10 9791 uzuzle24 9841 uzuzle34 9842 eluz4eluz2 9846 fz0to4untppr 10404 fzo0to42pr 10511 fldiv4p1lem1div2 10611 faclbnd2 11050 4bc2eq6 11082 resqrexlemover 11633 resqrexlemcalc1 11637 resqrexlemcalc2 11638 resqrexlemcalc3 11639 resqrexlemnm 11641 resqrexlemga 11646 sqrt2gt1lt2 11672 amgm2 11741 ef01bndlem 12380 sin01bnd 12381 cos01bnd 12382 cos2bnd 12384 flodddiv4 12560 4sqlem12 13038 tsetndxnstarvndx 13340 slotsdifplendx 13356 slotsdifdsndx 13371 slotsdifunifndx 13378 dveflem 15520 sin0pilem2 15576 sinhalfpilem 15585 sincosq1lem 15619 coseq0negpitopi 15630 tangtx 15632 sincos4thpi 15634 pigt3 15638 gausslemma2dlem0d 15854 gausslemma2dlem3 15865 gausslemma2dlem4 15866 |
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