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Mirrors > Home > ILE Home > Th. List > subcl | GIF version |
Description: Closure law for subtraction. (Contributed by NM, 10-May-1999.) (Revised by Mario Carneiro, 21-Dec-2013.) |
Ref | Expression |
---|---|
subcl | ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 − 𝐵) ∈ ℂ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | subval 8148 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 − 𝐵) = (℩𝑥 ∈ ℂ (𝐵 + 𝑥) = 𝐴)) | |
2 | negeu 8147 | . . . 4 ⊢ ((𝐵 ∈ ℂ ∧ 𝐴 ∈ ℂ) → ∃!𝑥 ∈ ℂ (𝐵 + 𝑥) = 𝐴) | |
3 | 2 | ancoms 268 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ∃!𝑥 ∈ ℂ (𝐵 + 𝑥) = 𝐴) |
4 | riotacl 5844 | . . 3 ⊢ (∃!𝑥 ∈ ℂ (𝐵 + 𝑥) = 𝐴 → (℩𝑥 ∈ ℂ (𝐵 + 𝑥) = 𝐴) ∈ ℂ) | |
5 | 3, 4 | syl 14 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (℩𝑥 ∈ ℂ (𝐵 + 𝑥) = 𝐴) ∈ ℂ) |
6 | 1, 5 | eqeltrd 2254 | 1 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 − 𝐵) ∈ ℂ) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 104 = wceq 1353 ∈ wcel 2148 ∃!wreu 2457 ℩crio 5829 (class class class)co 5874 ℂcc 7808 + caddc 7813 − cmin 8127 |
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-in1 614 ax-in2 615 ax-io 709 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-10 1505 ax-11 1506 ax-i12 1507 ax-bndl 1509 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-14 2151 ax-ext 2159 ax-sep 4121 ax-pow 4174 ax-pr 4209 ax-setind 4536 ax-resscn 7902 ax-1cn 7903 ax-icn 7905 ax-addcl 7906 ax-addrcl 7907 ax-mulcl 7908 ax-addcom 7910 ax-addass 7912 ax-distr 7914 ax-i2m1 7915 ax-0id 7918 ax-rnegex 7919 ax-cnre 7921 |
This theorem depends on definitions: df-bi 117 df-3an 980 df-tru 1356 df-fal 1359 df-nf 1461 df-sb 1763 df-eu 2029 df-mo 2030 df-clab 2164 df-cleq 2170 df-clel 2173 df-nfc 2308 df-ne 2348 df-ral 2460 df-rex 2461 df-reu 2462 df-rab 2464 df-v 2739 df-sbc 2963 df-dif 3131 df-un 3133 df-in 3135 df-ss 3142 df-pw 3577 df-sn 3598 df-pr 3599 df-op 3601 df-uni 3810 df-br 4004 df-opab 4065 df-id 4293 df-xp 4632 df-rel 4633 df-cnv 4634 df-co 4635 df-dm 4636 df-iota 5178 df-fun 5218 df-fv 5224 df-riota 5830 df-ov 5877 df-oprab 5878 df-mpo 5879 df-sub 8129 |
This theorem is referenced by: negcl 8156 subf 8158 pncan3 8164 npcan 8165 addsubass 8166 addsub 8167 addsub12 8169 addsubeq4 8171 npncan 8177 nppcan 8178 nnpcan 8179 nppcan3 8180 subcan2 8181 subsub2 8184 subsub4 8189 nnncan 8191 nnncan1 8192 nnncan2 8193 npncan3 8194 addsub4 8199 subadd4 8200 peano2cnm 8222 subcli 8232 subcld 8267 subeqrev 8332 subdi 8341 subdir 8342 mulsub2 8358 recextlem1 8607 recexap 8609 div2subap 8793 cju 8917 halfaddsubcl 9151 halfaddsub 9152 iccf1o 10003 ser3sub 10505 sqsubswap 10579 subsq 10626 subsq2 10627 bcn2 10743 shftval2 10834 2shfti 10839 sqabssub 11064 abssub 11109 abs3dif 11113 abs2dif 11114 abs2difabs 11116 climuni 11300 cjcn2 11323 recn2 11324 imcn2 11325 climsub 11335 fisum0diag2 11454 arisum2 11506 geosergap 11513 geolim 11518 geolim2 11519 georeclim 11520 geo2sum 11521 tanaddap 11746 addsin 11749 fzocongeq 11863 odd2np1 11877 phiprm 12222 pythagtriplem4 12267 pythagtriplem12 12274 pythagtriplem14 12276 fldivp1 12345 cnmet 14000 dveflem 14157 dvef 14158 efimpi 14210 ptolemy 14215 tangtx 14229 abssinper 14237 |
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