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| Mirrors > Home > MPE Home > Th. List > 3lt7 | Structured version Visualization version GIF version | ||
| Description: 3 is less than 7. (Contributed by Mario Carneiro, 15-Sep-2013.) |
| Ref | Expression |
|---|---|
| 3lt7 | ⊢ 3 < 7 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3lt4 12427 | . 2 ⊢ 3 < 4 | |
| 2 | 4lt7 12441 | . 2 ⊢ 4 < 7 | |
| 3 | 3re 12331 | . . 3 ⊢ 3 ∈ ℝ | |
| 4 | 4re 12335 | . . 3 ⊢ 4 ∈ ℝ | |
| 5 | 7re 12344 | . . 3 ⊢ 7 ∈ ℝ | |
| 6 | 3, 4, 5 | lttri 11346 | . 2 ⊢ ((3 < 4 ∧ 4 < 7) → 3 < 7) |
| 7 | 1, 2, 6 | mp2an 705 | 1 ⊢ 3 < 7 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: class class class wbr 5112 < clt 11253 3c3 12306 4c4 12307 7c7 12310 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2738 ax-sep 5260 ax-nul 5272 ax-pow 5339 ax-pr 5407 ax-un 7738 ax-resscn 11167 ax-1cn 11168 ax-icn 11169 ax-addcl 11170 ax-addrcl 11171 ax-mulcl 11172 ax-mulrcl 11173 ax-mulcom 11174 ax-addass 11175 ax-mulass 11176 ax-distr 11177 ax-i2m1 11178 ax-1ne0 11179 ax-1rid 11180 ax-rnegex 11181 ax-rrecex 11182 ax-cnre 11183 ax-pre-lttri 11184 ax-pre-lttrn 11185 ax-pre-ltadd 11186 ax-pre-mulgt0 11187 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-nel 3068 df-ral 3083 df-rex 3093 df-reu 3373 df-rab 3420 df-v 3460 df-sbc 3748 df-csb 3857 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-nul 4290 df-if 4491 df-pw 4567 df-sn 4593 df-pr 4595 df-op 4599 df-uni 4876 df-br 5113 df-opab 5177 df-mpt 5196 df-id 5559 df-po 5572 df-so 5573 df-xp 5670 df-rel 5671 df-cnv 5672 df-co 5673 df-dm 5674 df-rn 5675 df-res 5676 df-ima 5677 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7373 df-ov 7419 df-oprab 7420 df-mpo 7421 df-er 8696 df-en 8946 df-dom 8947 df-sdom 8948 df-pnf 11255 df-mnf 11256 df-xr 11257 df-ltxr 11258 df-le 11259 df-sub 11453 df-neg 11454 df-2 12313 df-3 12314 df-4 12315 df-5 12316 df-6 12317 df-7 12318 |
| This theorem is used by: 2lt7 12443 2lgslem3 27583 |
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