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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 9096 | . 2 ⊢ 4 = (3 + 1) | |
| 2 | 3re 9109 | . . 3 ⊢ 3 ∈ ℝ | |
| 3 | 1re 8070 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2, 3 | readdcli 8084 | . 2 ⊢ (3 + 1) ∈ ℝ |
| 5 | 1, 4 | eqeltri 2277 | 1 ⊢ 4 ∈ ℝ |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2175 (class class class)co 5943 ℝcr 7923 1c1 7925 + caddc 7927 3c3 9087 4c4 9088 |
| 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 1469 ax-gen 1471 ax-ie1 1515 ax-ie2 1516 ax-4 1532 ax-17 1548 ax-ial 1556 ax-ext 2186 ax-1re 8018 ax-addrcl 8021 |
| This theorem depends on definitions: df-bi 117 df-cleq 2197 df-clel 2200 df-2 9094 df-3 9095 df-4 9096 |
| This theorem is referenced by: 4cn 9113 5re 9114 4ne0 9133 4ap0 9134 5pos 9135 2lt4 9209 1lt4 9210 4lt5 9211 3lt5 9212 2lt5 9213 1lt5 9214 4lt6 9216 3lt6 9217 4lt7 9222 3lt7 9223 4lt8 9229 3lt8 9230 4lt9 9237 3lt9 9238 8th4div3 9255 div4p1lem1div2 9290 4lt10 9638 3lt10 9639 eluz4eluz2 9687 fz0to4untppr 10245 fzo0to42pr 10347 fldiv4p1lem1div2 10446 faclbnd2 10885 4bc2eq6 10917 resqrexlemover 11263 resqrexlemcalc1 11267 resqrexlemcalc2 11268 resqrexlemcalc3 11269 resqrexlemnm 11271 resqrexlemga 11276 sqrt2gt1lt2 11302 amgm2 11371 ef01bndlem 12009 sin01bnd 12010 cos01bnd 12011 cos2bnd 12013 flodddiv4 12189 4sqlem12 12667 tsetndxnstarvndx 12968 slotsdifplendx 12984 slotsdifdsndx 12999 slotsdifunifndx 13006 dveflem 15140 sin0pilem2 15196 sinhalfpilem 15205 sincosq1lem 15239 coseq0negpitopi 15250 tangtx 15252 sincos4thpi 15254 pigt3 15258 gausslemma2dlem0d 15471 gausslemma2dlem3 15482 gausslemma2dlem4 15483 |
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