addneintrd - Metamath Proof Explorer

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Theorem addneintrd 10846

Description: Introducing a term on the left-hand side of a sum in a negated equality. Contrapositive of addcanad 10844. Consequence of addcand 10842. (Contributed by David Moews, 28-Feb-2017.)

**Hypotheses**
Ref	Expression
muld.1	⊢ (𝜑 → 𝐴 ∈ ℂ)
addcomd.2	⊢ (𝜑 → 𝐵 ∈ ℂ)
addcand.3	⊢ (𝜑 → 𝐶 ∈ ℂ)
addneintrd.4	⊢ (𝜑 → 𝐵 ≠ 𝐶)

**Assertion**
Ref	Expression
addneintrd	⊢ (𝜑 → (𝐴 + 𝐵) ≠ (𝐴 + 𝐶))

**Proof of Theorem addneintrd**
Step	Hyp	Ref	Expression
1		addneintrd.4	. 2 ⊢ (𝜑 → 𝐵 ≠ 𝐶)
2		muld.1	. . . 4 ⊢ (𝜑 → 𝐴 ∈ ℂ)
3		addcomd.2	. . . 4 ⊢ (𝜑 → 𝐵 ∈ ℂ)
4		addcand.3	. . . 4 ⊢ (𝜑 → 𝐶 ∈ ℂ)
5	2, 3, 4	addcand 10842	. . 3 ⊢ (𝜑 → ((𝐴 + 𝐵) = (𝐴 + 𝐶) ↔ 𝐵 = 𝐶))
6	5	necon3bid 3060	. 2 ⊢ (𝜑 → ((𝐴 + 𝐵) ≠ (𝐴 + 𝐶) ↔ 𝐵 ≠ 𝐶))
7	1, 6	mpbird 259	1 ⊢ (𝜑 → (𝐴 + 𝐵) ≠ (𝐴 + 𝐶))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∈ wcel 2110 ≠ wne 3016 (class class class)co 7155 ℂcc 10534 + caddc 10539

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2157 ax-12 2173 ax-ext 2793 ax-sep 5202 ax-nul 5209 ax-pow 5265 ax-pr 5329 ax-un 7460 ax-resscn 10593 ax-1cn 10594 ax-icn 10595 ax-addcl 10596 ax-addrcl 10597 ax-mulcl 10598 ax-mulrcl 10599 ax-mulcom 10600 ax-addass 10601 ax-mulass 10602 ax-distr 10603 ax-i2m1 10604 ax-1ne0 10605 ax-1rid 10606 ax-rnegex 10607 ax-rrecex 10608 ax-cnre 10609 ax-pre-lttri 10610 ax-pre-lttrn 10611 ax-pre-ltadd 10612

This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-sbc 3772 df-csb 3883 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-nul 4291 df-if 4467 df-pw 4540 df-sn 4567 df-pr 4569 df-op 4573 df-uni 4838 df-br 5066 df-opab 5128 df-mpt 5146 df-id 5459 df-po 5473 df-so 5474 df-xp 5560 df-rel 5561 df-cnv 5562 df-co 5563 df-dm 5564 df-rn 5565 df-res 5566 df-ima 5567 df-iota 6313 df-fun 6356 df-fn 6357 df-f 6358 df-f1 6359 df-fo 6360 df-f1o 6361 df-fv 6362 df-ov 7158 df-er 8288 df-en 8509 df-dom 8510 df-sdom 8511 df-pnf 10676 df-mnf 10677 df-ltxr 10679

This theorem is referenced by: xov1plusxeqvd 12883 chordthmlem 25409 fourierdlem53 42443

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