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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 9204 | . 2 ⊢ 4 = (3 + 1) | |
| 2 | 3re 9217 | . . 3 ⊢ 3 ∈ ℝ | |
| 3 | 1re 8178 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2, 3 | readdcli 8192 | . 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 6018 ℝcr 8031 1c1 8033 + caddc 8035 3c3 9195 4c4 9196 |
| 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 8126 ax-addrcl 8129 |
| This theorem depends on definitions: df-bi 117 df-cleq 2224 df-clel 2227 df-2 9202 df-3 9203 df-4 9204 |
| This theorem is referenced by: 4cn 9221 5re 9222 4ne0 9241 4ap0 9242 5pos 9243 2lt4 9317 1lt4 9318 4lt5 9319 3lt5 9320 2lt5 9321 1lt5 9322 4lt6 9324 3lt6 9325 4lt7 9330 3lt7 9331 4lt8 9337 3lt8 9338 4lt9 9345 3lt9 9346 8th4div3 9363 div4p1lem1div2 9398 4lt10 9746 3lt10 9747 uzuzle24 9797 uzuzle34 9798 eluz4eluz2 9802 fz0to4untppr 10359 fzo0to42pr 10466 fldiv4p1lem1div2 10566 faclbnd2 11005 4bc2eq6 11037 resqrexlemover 11575 resqrexlemcalc1 11579 resqrexlemcalc2 11580 resqrexlemcalc3 11581 resqrexlemnm 11583 resqrexlemga 11588 sqrt2gt1lt2 11614 amgm2 11683 ef01bndlem 12322 sin01bnd 12323 cos01bnd 12324 cos2bnd 12326 flodddiv4 12502 4sqlem12 12980 tsetndxnstarvndx 13282 slotsdifplendx 13298 slotsdifdsndx 13313 slotsdifunifndx 13320 dveflem 15456 sin0pilem2 15512 sinhalfpilem 15521 sincosq1lem 15555 coseq0negpitopi 15566 tangtx 15568 sincos4thpi 15570 pigt3 15574 gausslemma2dlem0d 15787 gausslemma2dlem3 15798 gausslemma2dlem4 15799 |
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