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Mirrors > Home > MPE Home > Th. List > qrevaddcl | Structured version Visualization version GIF version |
Description: Reverse closure law for addition of rationals. (Contributed by NM, 2-Aug-2004.) |
Ref | Expression |
---|---|
qrevaddcl | ⊢ (𝐵 ∈ ℚ → ((𝐴 ∈ ℂ ∧ (𝐴 + 𝐵) ∈ ℚ) ↔ 𝐴 ∈ ℚ)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | qcn 11995 | . . . . . . . . 9 ⊢ (𝐵 ∈ ℚ → 𝐵 ∈ ℂ) | |
2 | pncan 10479 | . . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((𝐴 + 𝐵) − 𝐵) = 𝐴) | |
3 | 1, 2 | sylan2 492 | . . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℚ) → ((𝐴 + 𝐵) − 𝐵) = 𝐴) |
4 | 3 | ancoms 468 | . . . . . . 7 ⊢ ((𝐵 ∈ ℚ ∧ 𝐴 ∈ ℂ) → ((𝐴 + 𝐵) − 𝐵) = 𝐴) |
5 | 4 | adantr 472 | . . . . . 6 ⊢ (((𝐵 ∈ ℚ ∧ 𝐴 ∈ ℂ) ∧ (𝐴 + 𝐵) ∈ ℚ) → ((𝐴 + 𝐵) − 𝐵) = 𝐴) |
6 | qsubcl 12000 | . . . . . . . 8 ⊢ (((𝐴 + 𝐵) ∈ ℚ ∧ 𝐵 ∈ ℚ) → ((𝐴 + 𝐵) − 𝐵) ∈ ℚ) | |
7 | 6 | ancoms 468 | . . . . . . 7 ⊢ ((𝐵 ∈ ℚ ∧ (𝐴 + 𝐵) ∈ ℚ) → ((𝐴 + 𝐵) − 𝐵) ∈ ℚ) |
8 | 7 | adantlr 753 | . . . . . 6 ⊢ (((𝐵 ∈ ℚ ∧ 𝐴 ∈ ℂ) ∧ (𝐴 + 𝐵) ∈ ℚ) → ((𝐴 + 𝐵) − 𝐵) ∈ ℚ) |
9 | 5, 8 | eqeltrrd 2840 | . . . . 5 ⊢ (((𝐵 ∈ ℚ ∧ 𝐴 ∈ ℂ) ∧ (𝐴 + 𝐵) ∈ ℚ) → 𝐴 ∈ ℚ) |
10 | 9 | ex 449 | . . . 4 ⊢ ((𝐵 ∈ ℚ ∧ 𝐴 ∈ ℂ) → ((𝐴 + 𝐵) ∈ ℚ → 𝐴 ∈ ℚ)) |
11 | qaddcl 11997 | . . . . . 6 ⊢ ((𝐴 ∈ ℚ ∧ 𝐵 ∈ ℚ) → (𝐴 + 𝐵) ∈ ℚ) | |
12 | 11 | expcom 450 | . . . . 5 ⊢ (𝐵 ∈ ℚ → (𝐴 ∈ ℚ → (𝐴 + 𝐵) ∈ ℚ)) |
13 | 12 | adantr 472 | . . . 4 ⊢ ((𝐵 ∈ ℚ ∧ 𝐴 ∈ ℂ) → (𝐴 ∈ ℚ → (𝐴 + 𝐵) ∈ ℚ)) |
14 | 10, 13 | impbid 202 | . . 3 ⊢ ((𝐵 ∈ ℚ ∧ 𝐴 ∈ ℂ) → ((𝐴 + 𝐵) ∈ ℚ ↔ 𝐴 ∈ ℚ)) |
15 | 14 | pm5.32da 676 | . 2 ⊢ (𝐵 ∈ ℚ → ((𝐴 ∈ ℂ ∧ (𝐴 + 𝐵) ∈ ℚ) ↔ (𝐴 ∈ ℂ ∧ 𝐴 ∈ ℚ))) |
16 | qcn 11995 | . . 3 ⊢ (𝐴 ∈ ℚ → 𝐴 ∈ ℂ) | |
17 | 16 | pm4.71ri 668 | . 2 ⊢ (𝐴 ∈ ℚ ↔ (𝐴 ∈ ℂ ∧ 𝐴 ∈ ℚ)) |
18 | 15, 17 | syl6bbr 278 | 1 ⊢ (𝐵 ∈ ℚ → ((𝐴 ∈ ℂ ∧ (𝐴 + 𝐵) ∈ ℚ) ↔ 𝐴 ∈ ℚ)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 196 ∧ wa 383 = wceq 1632 ∈ wcel 2139 (class class class)co 6813 ℂcc 10126 + caddc 10131 − cmin 10458 ℚcq 11981 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1871 ax-4 1886 ax-5 1988 ax-6 2054 ax-7 2090 ax-8 2141 ax-9 2148 ax-10 2168 ax-11 2183 ax-12 2196 ax-13 2391 ax-ext 2740 ax-sep 4933 ax-nul 4941 ax-pow 4992 ax-pr 5055 ax-un 7114 ax-resscn 10185 ax-1cn 10186 ax-icn 10187 ax-addcl 10188 ax-addrcl 10189 ax-mulcl 10190 ax-mulrcl 10191 ax-mulcom 10192 ax-addass 10193 ax-mulass 10194 ax-distr 10195 ax-i2m1 10196 ax-1ne0 10197 ax-1rid 10198 ax-rnegex 10199 ax-rrecex 10200 ax-cnre 10201 ax-pre-lttri 10202 ax-pre-lttrn 10203 ax-pre-ltadd 10204 ax-pre-mulgt0 10205 |
This theorem depends on definitions: df-bi 197 df-or 384 df-an 385 df-3or 1073 df-3an 1074 df-tru 1635 df-ex 1854 df-nf 1859 df-sb 2047 df-eu 2611 df-mo 2612 df-clab 2747 df-cleq 2753 df-clel 2756 df-nfc 2891 df-ne 2933 df-nel 3036 df-ral 3055 df-rex 3056 df-reu 3057 df-rmo 3058 df-rab 3059 df-v 3342 df-sbc 3577 df-csb 3675 df-dif 3718 df-un 3720 df-in 3722 df-ss 3729 df-pss 3731 df-nul 4059 df-if 4231 df-pw 4304 df-sn 4322 df-pr 4324 df-tp 4326 df-op 4328 df-uni 4589 df-iun 4674 df-br 4805 df-opab 4865 df-mpt 4882 df-tr 4905 df-id 5174 df-eprel 5179 df-po 5187 df-so 5188 df-fr 5225 df-we 5227 df-xp 5272 df-rel 5273 df-cnv 5274 df-co 5275 df-dm 5276 df-rn 5277 df-res 5278 df-ima 5279 df-pred 5841 df-ord 5887 df-on 5888 df-lim 5889 df-suc 5890 df-iota 6012 df-fun 6051 df-fn 6052 df-f 6053 df-f1 6054 df-fo 6055 df-f1o 6056 df-fv 6057 df-riota 6774 df-ov 6816 df-oprab 6817 df-mpt2 6818 df-om 7231 df-1st 7333 df-2nd 7334 df-wrecs 7576 df-recs 7637 df-rdg 7675 df-er 7911 df-en 8122 df-dom 8123 df-sdom 8124 df-pnf 10268 df-mnf 10269 df-xr 10270 df-ltxr 10271 df-le 10272 df-sub 10460 df-neg 10461 df-div 10877 df-nn 11213 df-n0 11485 df-z 11570 df-q 11982 |
This theorem is referenced by: (None) |
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