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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 9344 | . 2 ⊢ 4 = (3 + 1) | |
| 2 | 3re 9357 | . . 3 ⊢ 3 ∈ ℝ | |
| 3 | 1re 8315 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2, 3 | readdcli 8329 | . 2 ⊢ (3 + 1) ∈ ℝ |
| 5 | 1, 4 | eqeltri 2311 | 1 ⊢ 4 ∈ ℝ |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2209 (class class class)co 6075 ℝcr 8168 1c1 8170 + caddc 8172 3c3 9335 4c4 9336 |
| 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 1500 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-4 1563 ax-17 1579 ax-ial 1587 ax-ext 2220 ax-1re 8263 ax-addrcl 8266 |
| This theorem depends on definitions: df-bi 117 df-cleq 2231 df-clel 2234 df-2 9342 df-3 9343 df-4 9344 |
| This theorem is referenced by: 4cn 9361 5re 9362 4ne0 9381 4ap0 9382 5pos 9383 2lt4 9457 1lt4 9458 4lt5 9459 3lt5 9460 2lt5 9461 1lt5 9462 4lt6 9464 3lt6 9465 4lt7 9470 3lt7 9471 4lt8 9477 3lt8 9478 4lt9 9485 3lt9 9486 8th4div3 9503 div4p1lem1div2 9538 4lt10 9891 3lt10 9892 uzuzle24 9942 uzuzle34 9943 eluz4eluz2 9947 fz0to4untppr 10509 fzo0to42pr 10616 fldiv4p1lem1div2 10718 faclbnd2 11158 4bc2eq6 11191 resqrexlemover 11754 resqrexlemcalc1 11758 resqrexlemcalc2 11759 resqrexlemcalc3 11760 resqrexlemnm 11762 resqrexlemga 11767 sqrt2gt1lt2 11793 amgm2 11862 ef01bndlem 12501 sin01bnd 12502 cos01bnd 12503 cos2bnd 12505 flodddiv4 12681 4sqlem12 13159 tsetndxnstarvndx 13525 slotsdifplendx 13541 slotsdifdsndx 13556 slotsdifunifndx 13563 dveflem 15750 sin0pilem2 15806 sinhalfpilem 15815 sincosq1lem 15849 coseq0negpitopi 15860 tangtx 15862 sincos4thpi 15864 pigt3 15868 gausslemma2dlem0d 16085 gausslemma2dlem3 16096 gausslemma2dlem4 16097 |
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