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| Mirrors > Home > ILE Home > Th. List > 3re | GIF version | ||
| Description: The number 3 is real. (Contributed by NM, 27-May-1999.) |
| Ref | Expression |
|---|---|
| 3re | ⊢ 3 ∈ ℝ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-3 9203 | . 2 ⊢ 3 = (2 + 1) | |
| 2 | 2re 9213 | . . 3 ⊢ 2 ∈ ℝ | |
| 3 | 1re 8178 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2, 3 | readdcli 8192 | . 2 ⊢ (2 + 1) ∈ ℝ |
| 5 | 1, 4 | eqeltri 2304 | 1 ⊢ 3 ∈ ℝ |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2202 (class class class)co 6018 ℝcr 8031 1c1 8033 + caddc 8035 2c2 9194 3c3 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 8126 ax-addrcl 8129 |
| This theorem depends on definitions: df-bi 117 df-cleq 2224 df-clel 2227 df-2 9202 df-3 9203 |
| This theorem is referenced by: 3cn 9218 4re 9220 3ne0 9238 3ap0 9239 4pos 9240 1lt3 9315 3lt4 9316 2lt4 9317 3lt5 9320 3lt6 9325 2lt6 9326 3lt7 9331 2lt7 9332 3lt8 9338 2lt8 9339 3lt9 9346 2lt9 9347 1le3 9355 8th4div3 9363 halfpm6th 9364 3halfnz 9577 3lt10 9747 2lt10 9748 5eluz3 9795 uzuzle23 9796 uzuzle34 9798 uz3m2nn 9807 nn01to3 9851 3rp 9894 fz0to4untppr 10359 expnass 10908 sqrt9 11626 ef01bndlem 12335 sin01bnd 12336 cos2bnd 12339 sin01gt0 12341 cos01gt0 12342 egt2lt3 12359 flodddiv4 12515 starvndxnmulrndx 13245 scandxnmulrndx 13257 vscandxnmulrndx 13262 ipndxnmulrndx 13275 tsetndxnmulrndx 13294 plendxnmulrndx 13308 dsndxnmulrndx 13323 slotsdifunifndx 13333 dveflem 15469 sincosq3sgn 15571 sincosq4sgn 15572 cosq23lt0 15576 coseq0q4123 15577 coseq00topi 15578 coseq0negpitopi 15579 tangtx 15581 sincos6thpi 15585 pigt3 15587 pige3 15588 cos02pilt1 15594 lgsdir2lem1 15776 2lgslem3 15849 konigsbergiedgwen 16354 konigsberglem1 16358 konigsberglem2 16359 konigsberglem3 16360 konigsberglem4 16361 ex-fl 16368 ex-gcd 16374 |
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