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Mirrors > Home > ILE Home > Th. List > addneintrd | GIF version |
Description: Introducing a term on the left-hand side of a sum in a negated equality. Contrapositive of addcanad 8075. Consequence of addcand 8073. (Contributed by David Moews, 28-Feb-2017.) |
Ref | Expression |
---|---|
addcand.1 | ⊢ (𝜑 → 𝐴 ∈ ℂ) |
addcand.2 | ⊢ (𝜑 → 𝐵 ∈ ℂ) |
addcand.3 | ⊢ (𝜑 → 𝐶 ∈ ℂ) |
addneintrd.4 | ⊢ (𝜑 → 𝐵 ≠ 𝐶) |
Ref | Expression |
---|---|
addneintrd | ⊢ (𝜑 → (𝐴 + 𝐵) ≠ (𝐴 + 𝐶)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | addneintrd.4 | . 2 ⊢ (𝜑 → 𝐵 ≠ 𝐶) | |
2 | addcand.1 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℂ) | |
3 | addcand.2 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ ℂ) | |
4 | addcand.3 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ ℂ) | |
5 | 2, 3, 4 | addcand 8073 | . . 3 ⊢ (𝜑 → ((𝐴 + 𝐵) = (𝐴 + 𝐶) ↔ 𝐵 = 𝐶)) |
6 | 5 | necon3bid 2375 | . 2 ⊢ (𝜑 → ((𝐴 + 𝐵) ≠ (𝐴 + 𝐶) ↔ 𝐵 ≠ 𝐶)) |
7 | 1, 6 | mpbird 166 | 1 ⊢ (𝜑 → (𝐴 + 𝐵) ≠ (𝐴 + 𝐶)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∈ wcel 2135 ≠ wne 2334 (class class class)co 5836 ℂcc 7742 + caddc 7747 |
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 604 ax-in2 605 ax-io 699 ax-5 1434 ax-7 1435 ax-gen 1436 ax-ie1 1480 ax-ie2 1481 ax-8 1491 ax-10 1492 ax-11 1493 ax-i12 1494 ax-bndl 1496 ax-4 1497 ax-17 1513 ax-i9 1517 ax-ial 1521 ax-i5r 1522 ax-ext 2146 ax-resscn 7836 ax-1cn 7837 ax-icn 7839 ax-addcl 7840 ax-addrcl 7841 ax-mulcl 7842 ax-addcom 7844 ax-addass 7846 ax-distr 7848 ax-i2m1 7849 ax-0id 7852 ax-rnegex 7853 ax-cnre 7855 |
This theorem depends on definitions: df-bi 116 df-3an 969 df-tru 1345 df-nf 1448 df-sb 1750 df-clab 2151 df-cleq 2157 df-clel 2160 df-nfc 2295 df-ne 2335 df-ral 2447 df-rex 2448 df-v 2723 df-un 3115 df-in 3117 df-ss 3124 df-sn 3576 df-pr 3577 df-op 3579 df-uni 3784 df-br 3977 df-iota 5147 df-fv 5190 df-ov 5839 |
This theorem is referenced by: (None) |
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