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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 9364 | . 2 ⊢ 3 = (2 + 1) | |
| 2 | 2re 9374 | . . 3 ⊢ 2 ∈ ℝ | |
| 3 | 1re 8325 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2, 3 | readdcli 8339 | . 2 ⊢ (2 + 1) ∈ ℝ |
| 5 | 1, 4 | eqeltri 2311 | 1 ⊢ 3 ∈ ℝ |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ∈ wcel 2209 (class class class)co 6085 ℝcr 8178 1c1 8180 + caddc 8182 2c2 9355 3c3 9356 |
| This proof depends on 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 8273 ax-addrcl 8276 |
| This proof depends on definitions: df-bi 117 df-cleq 2231 df-clel 2234 df-2 9363 df-3 9364 |
| This theorem is used by: 3cn 9379 4re 9381 3ne0 9399 3ap0 9400 4pos 9401 1lt3 9476 3lt4 9477 2lt4 9478 3lt5 9481 3lt6 9486 2lt6 9487 3lt7 9492 2lt7 9493 3lt8 9499 2lt8 9500 3lt9 9507 2lt9 9508 1le3 9516 8th4div3 9524 halfpm6th 9525 3halfnz 9743 3lt10 9913 2lt10 9914 5eluz3 9961 uzuzle23 9962 uzuzle34 9964 uz3m2nn 9973 nn01to3 10017 3rp 10060 fz0to4untppr 10531 expnass 11082 sqrt9 11814 ef01bndlem 12523 sin01bnd 12524 cos2bnd 12527 sin01gt0 12529 cos01gt0 12530 egt2lt3 12547 flodddiv4 12703 starvndxnmulrndx 13498 scandxnmulrndx 13510 vscandxnmulrndx 13515 ipndxnmulrndx 13528 tsetndxnmulrndx 13547 plendxnmulrndx 13561 dsndxnmulrndx 13576 slotsdifunifndx 13586 dveflem 15827 sincosq3sgn 15929 sincosq4sgn 15930 cosq23lt0 15934 coseq0q4123 15935 coseq00topi 15936 coseq0negpitopi 15937 tangtx 15939 sincos6thpi 15943 pigt3 15945 pige3 15946 cos02pilt1 15952 log2tlbndlog2 16082 log2ublog2 16086 lgsdir2lem1 16147 2lgslem3 16220 konigsbergiedgwen 16725 konigsberglem1 16729 konigsberglem2 16730 konigsberglem3 16731 konigsberglem4 16732 ex-fl 16739 ex-gcd 16745 |
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