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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 9373 | . 2 ⊢ 3 = (2 + 1) | |
| 2 | 2re 9383 | . . 3 ⊢ 2 ∈ ℝ | |
| 3 | 1re 8331 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2, 3 | readdcli 8345 | . 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 6088 ℝcr 8184 1c1 8186 + caddc 8188 2c2 9364 3c3 9365 |
| 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 8279 ax-addrcl 8282 |
| This proof depends on definitions: df-bi 117 df-cleq 2231 df-clel 2234 df-2 9372 df-3 9373 |
| This theorem is used by: 3cn 9388 4re 9390 3ne0 9408 3ap0 9409 4pos 9410 1lt3 9487 3lt4 9488 2lt4 9489 3lt5 9492 3lt6 9497 2lt6 9498 3lt7 9503 2lt7 9504 3lt8 9510 2lt8 9511 3lt9 9518 2lt9 9519 1le3 9527 8th4div3 9535 halfpm6th 9536 3halfnz 9753 3lt10 9928 2lt10 9929 5eluz3 9976 uzuzle23 9977 uzuzle34 9979 uz3m2nn 9988 nn01to3 10032 3rp 10076 fz0to4untppr 10547 expnass 11102 sqrt9 11835 ef01bndlem 12547 sin01bnd 12548 cos2bnd 12551 sin01gt0 12553 cos01gt0 12554 egt2lt3 12571 flodddiv4 12727 starvndxnmulrndx 13556 scandxnmulrndx 13568 vscandxnmulrndx 13573 ipndxnmulrndx 13586 tsetndxnmulrndx 13605 plendxnmulrndx 13619 dsndxnmulrndx 13634 slotsdifunifndx 13644 dveflem 15969 sincosq3sgn 16072 sincosq4sgn 16073 cosq23lt0 16077 coseq0q4123 16078 coseq00topi 16079 coseq0negpitopi 16080 tangtx 16082 sincos6thpi 16086 pigt3 16088 pige3 16089 cos02pilt1 16096 log2tlbndlog2 16237 log2ublog2 16241 ppiqub 16310 chtqub 16313 bposlem2 16329 bposlem3 16330 bposlem4 16331 bposlem5 16332 bposlem6 16333 bposlem8 16335 bposlem9 16336 lgsdir2lem1 16369 2lgslem3 16442 konigsbergiedgwen 16947 konigsberglem1 16951 konigsberglem2 16952 konigsberglem3 16953 konigsberglem4 16954 ex-fl 16961 ex-gcd 16967 |
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