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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 9203 | . 2 ⊢ 4 = (3 + 1) | |
| 2 | 3re 9216 | . . 3 ⊢ 3 ∈ ℝ | |
| 3 | 1re 8177 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2, 3 | readdcli 8191 | . 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 6017 ℝcr 8030 1c1 8032 + caddc 8034 3c3 9194 4c4 9195 |
| 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 1495 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-4 1558 ax-17 1574 ax-ial 1582 ax-ext 2213 ax-1re 8125 ax-addrcl 8128 |
| This theorem depends on definitions: df-bi 117 df-cleq 2224 df-clel 2227 df-2 9201 df-3 9202 df-4 9203 |
| This theorem is referenced by: 4cn 9220 5re 9221 4ne0 9240 4ap0 9241 5pos 9242 2lt4 9316 1lt4 9317 4lt5 9318 3lt5 9319 2lt5 9320 1lt5 9321 4lt6 9323 3lt6 9324 4lt7 9329 3lt7 9330 4lt8 9336 3lt8 9337 4lt9 9344 3lt9 9345 8th4div3 9362 div4p1lem1div2 9397 4lt10 9745 3lt10 9746 uzuzle24 9796 uzuzle34 9797 eluz4eluz2 9801 fz0to4untppr 10358 fzo0to42pr 10464 fldiv4p1lem1div2 10564 faclbnd2 11003 4bc2eq6 11035 resqrexlemover 11570 resqrexlemcalc1 11574 resqrexlemcalc2 11575 resqrexlemcalc3 11576 resqrexlemnm 11578 resqrexlemga 11583 sqrt2gt1lt2 11609 amgm2 11678 ef01bndlem 12316 sin01bnd 12317 cos01bnd 12318 cos2bnd 12320 flodddiv4 12496 4sqlem12 12974 tsetndxnstarvndx 13276 slotsdifplendx 13292 slotsdifdsndx 13307 slotsdifunifndx 13314 dveflem 15449 sin0pilem2 15505 sinhalfpilem 15514 sincosq1lem 15548 coseq0negpitopi 15559 tangtx 15561 sincos4thpi 15563 pigt3 15567 gausslemma2dlem0d 15780 gausslemma2dlem3 15791 gausslemma2dlem4 15792 |
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