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Mirrors > Home > ILE Home > Th. List > subadd | GIF version |
Description: Relationship between subtraction and addition. (Contributed by NM, 20-Jan-1997.) (Revised by Mario Carneiro, 21-Dec-2013.) |
Ref | Expression |
---|---|
subadd | ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → ((𝐴 − 𝐵) = 𝐶 ↔ (𝐵 + 𝐶) = 𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | subval 8111 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 − 𝐵) = (℩𝑥 ∈ ℂ (𝐵 + 𝑥) = 𝐴)) | |
2 | 1 | eqeq1d 2179 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((𝐴 − 𝐵) = 𝐶 ↔ (℩𝑥 ∈ ℂ (𝐵 + 𝑥) = 𝐴) = 𝐶)) |
3 | 2 | 3adant3 1012 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → ((𝐴 − 𝐵) = 𝐶 ↔ (℩𝑥 ∈ ℂ (𝐵 + 𝑥) = 𝐴) = 𝐶)) |
4 | negeu 8110 | . . . . 5 ⊢ ((𝐵 ∈ ℂ ∧ 𝐴 ∈ ℂ) → ∃!𝑥 ∈ ℂ (𝐵 + 𝑥) = 𝐴) | |
5 | oveq2 5861 | . . . . . . 7 ⊢ (𝑥 = 𝐶 → (𝐵 + 𝑥) = (𝐵 + 𝐶)) | |
6 | 5 | eqeq1d 2179 | . . . . . 6 ⊢ (𝑥 = 𝐶 → ((𝐵 + 𝑥) = 𝐴 ↔ (𝐵 + 𝐶) = 𝐴)) |
7 | 6 | riota2 5831 | . . . . 5 ⊢ ((𝐶 ∈ ℂ ∧ ∃!𝑥 ∈ ℂ (𝐵 + 𝑥) = 𝐴) → ((𝐵 + 𝐶) = 𝐴 ↔ (℩𝑥 ∈ ℂ (𝐵 + 𝑥) = 𝐴) = 𝐶)) |
8 | 4, 7 | sylan2 284 | . . . 4 ⊢ ((𝐶 ∈ ℂ ∧ (𝐵 ∈ ℂ ∧ 𝐴 ∈ ℂ)) → ((𝐵 + 𝐶) = 𝐴 ↔ (℩𝑥 ∈ ℂ (𝐵 + 𝑥) = 𝐴) = 𝐶)) |
9 | 8 | 3impb 1194 | . . 3 ⊢ ((𝐶 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐴 ∈ ℂ) → ((𝐵 + 𝐶) = 𝐴 ↔ (℩𝑥 ∈ ℂ (𝐵 + 𝑥) = 𝐴) = 𝐶)) |
10 | 9 | 3com13 1203 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → ((𝐵 + 𝐶) = 𝐴 ↔ (℩𝑥 ∈ ℂ (𝐵 + 𝑥) = 𝐴) = 𝐶)) |
11 | 3, 10 | bitr4d 190 | 1 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → ((𝐴 − 𝐵) = 𝐶 ↔ (𝐵 + 𝐶) = 𝐴)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 ∧ w3a 973 = wceq 1348 ∈ wcel 2141 ∃!wreu 2450 ℩crio 5808 (class class class)co 5853 ℂcc 7772 + caddc 7777 − cmin 8090 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 609 ax-in2 610 ax-io 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-14 2144 ax-ext 2152 ax-sep 4107 ax-pow 4160 ax-pr 4194 ax-setind 4521 ax-resscn 7866 ax-1cn 7867 ax-icn 7869 ax-addcl 7870 ax-addrcl 7871 ax-mulcl 7872 ax-addcom 7874 ax-addass 7876 ax-distr 7878 ax-i2m1 7879 ax-0id 7882 ax-rnegex 7883 ax-cnre 7885 |
This theorem depends on definitions: df-bi 116 df-3an 975 df-tru 1351 df-fal 1354 df-nf 1454 df-sb 1756 df-eu 2022 df-mo 2023 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-ne 2341 df-ral 2453 df-rex 2454 df-reu 2455 df-rab 2457 df-v 2732 df-sbc 2956 df-dif 3123 df-un 3125 df-in 3127 df-ss 3134 df-pw 3568 df-sn 3589 df-pr 3590 df-op 3592 df-uni 3797 df-br 3990 df-opab 4051 df-id 4278 df-xp 4617 df-rel 4618 df-cnv 4619 df-co 4620 df-dm 4621 df-iota 5160 df-fun 5200 df-fv 5206 df-riota 5809 df-ov 5856 df-oprab 5857 df-mpo 5858 df-sub 8092 |
This theorem is referenced by: subadd2 8123 subsub23 8124 pncan 8125 pncan3 8127 addsubeq4 8134 subsub2 8147 renegcl 8180 subaddi 8206 subaddd 8248 fzen 9999 nn0ennn 10389 cos2t 11713 cos2tsin 11714 odd2np1 11832 divalgb 11884 sincosq1eq 13554 coskpi 13563 |
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