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Theorem xadddi2 13240

Description: The assumption that the multiplier be real in xadddi 13238 can be relaxed if the addends have the same sign. (Contributed by Mario Carneiro, 20-Aug-2015.)

**Assertion**
Ref	Expression
xadddi2	⊢ ((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) → (𝐴 ·_e (𝐵 +_𝑒 𝐶)) = ((𝐴 ·_e 𝐵) +_𝑒 (𝐴 ·_e 𝐶)))

**Proof of Theorem xadddi2**
Step	Hyp	Ref	Expression
1		simpr 484	. . . 4 ⊢ ((((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) ∧ 𝐴 ∈ ℝ) → 𝐴 ∈ ℝ)
2		simp2l 1201	. . . . 5 ⊢ ((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) → 𝐵 ∈ ℝ^*)
3	2	ad2antrr 727	. . . 4 ⊢ ((((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) ∧ 𝐴 ∈ ℝ) → 𝐵 ∈ ℝ^*)
4		simp3l 1203	. . . . 5 ⊢ ((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) → 𝐶 ∈ ℝ^*)
5	4	ad2antrr 727	. . . 4 ⊢ ((((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) ∧ 𝐴 ∈ ℝ) → 𝐶 ∈ ℝ^*)
6		xadddi 13238	. . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^*) → (𝐴 ·_e (𝐵 +_𝑒 𝐶)) = ((𝐴 ·_e 𝐵) +_𝑒 (𝐴 ·_e 𝐶)))
7	1, 3, 5, 6	syl3anc 1374	. . 3 ⊢ ((((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) ∧ 𝐴 ∈ ℝ) → (𝐴 ·_e (𝐵 +_𝑒 𝐶)) = ((𝐴 ·_e 𝐵) +_𝑒 (𝐴 ·_e 𝐶)))
8		pnfxr 11190	. . . . . 6 ⊢ +∞ ∈ ℝ^*
9	4	adantr 480	. . . . . 6 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → 𝐶 ∈ ℝ^*)
10		xmulcl 13216	. . . . . 6 ⊢ ((+∞ ∈ ℝ^* ∧ 𝐶 ∈ ℝ^) → (+∞ ·_e 𝐶) ∈ ℝ^)
11	8, 9, 10	sylancr 588	. . . . 5 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → (+∞ ·_e 𝐶) ∈ ℝ^*)
12		simpl3r 1231	. . . . . . . 8 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → 0 ≤ 𝐶)
13		0lepnf 13075	. . . . . . . . 9 ⊢ 0 ≤ +∞
14		xmulge0 13227	. . . . . . . . 9 ⊢ (((+∞ ∈ ℝ^* ∧ 0 ≤ +∞) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) → 0 ≤ (+∞ ·_e 𝐶))
15	8, 13, 14	mpanl12 703	. . . . . . . 8 ⊢ ((𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶) → 0 ≤ (+∞ ·_e 𝐶))
16	4, 12, 15	syl2an2r 686	. . . . . . 7 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → 0 ≤ (+∞ ·_e 𝐶))
17		ge0nemnf 13116	. . . . . . 7 ⊢ (((+∞ ·_e 𝐶) ∈ ℝ^* ∧ 0 ≤ (+∞ ·_e 𝐶)) → (+∞ ·_e 𝐶) ≠ -∞)
18	11, 16, 17	syl2anc 585	. . . . . 6 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → (+∞ ·_e 𝐶) ≠ -∞)
19	18	adantr 480	. . . . 5 ⊢ ((((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) ∧ 𝐴 = +∞) → (+∞ ·_e 𝐶) ≠ -∞)
20		xaddpnf2 13170	. . . . 5 ⊢ (((+∞ ·_e 𝐶) ∈ ℝ^* ∧ (+∞ ·_e 𝐶) ≠ -∞) → (+∞ +_𝑒 (+∞ ·_e 𝐶)) = +∞)
21	11, 19, 20	syl2an2r 686	. . . 4 ⊢ ((((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) ∧ 𝐴 = +∞) → (+∞ +_𝑒 (+∞ ·_e 𝐶)) = +∞)
22		oveq1 7367	. . . . . 6 ⊢ (𝐴 = +∞ → (𝐴 ·_e 𝐵) = (+∞ ·_e 𝐵))
23		oveq1 7367	. . . . . 6 ⊢ (𝐴 = +∞ → (𝐴 ·_e 𝐶) = (+∞ ·_e 𝐶))
24	22, 23	oveq12d 7378	. . . . 5 ⊢ (𝐴 = +∞ → ((𝐴 ·_e 𝐵) +_𝑒 (𝐴 ·_e 𝐶)) = ((+∞ ·_e 𝐵) +_𝑒 (+∞ ·_e 𝐶)))
25		xmulpnf2 13218	. . . . . . 7 ⊢ ((𝐵 ∈ ℝ^* ∧ 0 < 𝐵) → (+∞ ·_e 𝐵) = +∞)
26	2, 25	sylan 581	. . . . . 6 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → (+∞ ·_e 𝐵) = +∞)
27	26	oveq1d 7375	. . . . 5 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → ((+∞ ·_e 𝐵) +_𝑒 (+∞ ·_e 𝐶)) = (+∞ +_𝑒 (+∞ ·_e 𝐶)))
28	24, 27	sylan9eqr 2794	. . . 4 ⊢ ((((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) ∧ 𝐴 = +∞) → ((𝐴 ·_e 𝐵) +_𝑒 (𝐴 ·_e 𝐶)) = (+∞ +_𝑒 (+∞ ·_e 𝐶)))
29		oveq1 7367	. . . . 5 ⊢ (𝐴 = +∞ → (𝐴 ·_e (𝐵 +_𝑒 𝐶)) = (+∞ ·_e (𝐵 +_𝑒 𝐶)))
30		xaddcl 13182	. . . . . . 7 ⊢ ((𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^) → (𝐵 +_𝑒 𝐶) ∈ ℝ^)
31	2, 4, 30	syl2anc 585	. . . . . 6 ⊢ ((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) → (𝐵 +_𝑒 𝐶) ∈ ℝ^*)
32		0xr 11183	. . . . . . . 8 ⊢ 0 ∈ ℝ^*
33	32	a1i 11	. . . . . . 7 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → 0 ∈ ℝ^*)
34	2	adantr 480	. . . . . . 7 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → 𝐵 ∈ ℝ^*)
35	31	adantr 480	. . . . . . 7 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → (𝐵 +_𝑒 𝐶) ∈ ℝ^*)
36		simpr 484	. . . . . . 7 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → 0 < 𝐵)
37	34	xaddridd 13186	. . . . . . . 8 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → (𝐵 +_𝑒 0) = 𝐵)
38		xleadd2a 13197	. . . . . . . . 9 ⊢ (((0 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^*) ∧ 0 ≤ 𝐶) → (𝐵 +_𝑒 0) ≤ (𝐵 +_𝑒 𝐶))
39	33, 9, 34, 12, 38	syl31anc 1376	. . . . . . . 8 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → (𝐵 +_𝑒 0) ≤ (𝐵 +_𝑒 𝐶))
40	37, 39	eqbrtrrd 5110	. . . . . . 7 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → 𝐵 ≤ (𝐵 +_𝑒 𝐶))
41	33, 34, 35, 36, 40	xrltletrd 13103	. . . . . 6 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → 0 < (𝐵 +_𝑒 𝐶))
42		xmulpnf2 13218	. . . . . 6 ⊢ (((𝐵 +_𝑒 𝐶) ∈ ℝ^* ∧ 0 < (𝐵 +_𝑒 𝐶)) → (+∞ ·_e (𝐵 +_𝑒 𝐶)) = +∞)
43	31, 41, 42	syl2an2r 686	. . . . 5 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → (+∞ ·_e (𝐵 +_𝑒 𝐶)) = +∞)
44	29, 43	sylan9eqr 2794	. . . 4 ⊢ ((((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) ∧ 𝐴 = +∞) → (𝐴 ·_e (𝐵 +_𝑒 𝐶)) = +∞)
45	21, 28, 44	3eqtr4rd 2783	. . 3 ⊢ ((((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) ∧ 𝐴 = +∞) → (𝐴 ·_e (𝐵 +_𝑒 𝐶)) = ((𝐴 ·_e 𝐵) +_𝑒 (𝐴 ·_e 𝐶)))
46		mnfxr 11193	. . . . . . 7 ⊢ -∞ ∈ ℝ^*
47		xmulcl 13216	. . . . . . 7 ⊢ ((-∞ ∈ ℝ^* ∧ 𝐶 ∈ ℝ^) → (-∞ ·_e 𝐶) ∈ ℝ^)
48	46, 9, 47	sylancr 588	. . . . . 6 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → (-∞ ·_e 𝐶) ∈ ℝ^*)
49		xmulneg1 13212	. . . . . . . . . . . 12 ⊢ ((-∞ ∈ ℝ^* ∧ 𝐶 ∈ ℝ^*) → (-_𝑒-∞ ·_e 𝐶) = -_𝑒(-∞ ·_e 𝐶))
50	46, 9, 49	sylancr 588	. . . . . . . . . . 11 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → (-_𝑒-∞ ·_e 𝐶) = -_𝑒(-∞ ·_e 𝐶))
51		xnegmnf 13153	. . . . . . . . . . . 12 ⊢ -_𝑒-∞ = +∞
52	51	oveq1i 7370	. . . . . . . . . . 11 ⊢ (-_𝑒-∞ ·_e 𝐶) = (+∞ ·_e 𝐶)
53	50, 52	eqtr3di 2787	. . . . . . . . . 10 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → -_𝑒(-∞ ·_e 𝐶) = (+∞ ·_e 𝐶))
54		xnegpnf 13152	. . . . . . . . . . 11 ⊢ -_𝑒+∞ = -∞
55	54	a1i 11	. . . . . . . . . 10 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → -_𝑒+∞ = -∞)
56	53, 55	eqeq12d 2753	. . . . . . . . 9 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → (-_𝑒(-∞ ·_e 𝐶) = -_𝑒+∞ ↔ (+∞ ·_e 𝐶) = -∞))
57		xneg11 13158	. . . . . . . . . 10 ⊢ (((-∞ ·_e 𝐶) ∈ ℝ^* ∧ +∞ ∈ ℝ^*) → (-_𝑒(-∞ ·_e 𝐶) = -_𝑒+∞ ↔ (-∞ ·_e 𝐶) = +∞))
58	48, 8, 57	sylancl 587	. . . . . . . . 9 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → (-_𝑒(-∞ ·_e 𝐶) = -_𝑒+∞ ↔ (-∞ ·_e 𝐶) = +∞))
59	56, 58	bitr3d 281	. . . . . . . 8 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → ((+∞ ·_e 𝐶) = -∞ ↔ (-∞ ·_e 𝐶) = +∞))
60	59	necon3bid 2977	. . . . . . 7 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → ((+∞ ·_e 𝐶) ≠ -∞ ↔ (-∞ ·_e 𝐶) ≠ +∞))
61	18, 60	mpbid 232	. . . . . 6 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → (-∞ ·_e 𝐶) ≠ +∞)
62		xaddmnf2 13172	. . . . . 6 ⊢ (((-∞ ·_e 𝐶) ∈ ℝ^* ∧ (-∞ ·_e 𝐶) ≠ +∞) → (-∞ +_𝑒 (-∞ ·_e 𝐶)) = -∞)
63	48, 61, 62	syl2anc 585	. . . . 5 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → (-∞ +_𝑒 (-∞ ·_e 𝐶)) = -∞)
64	63	adantr 480	. . . 4 ⊢ ((((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) ∧ 𝐴 = -∞) → (-∞ +_𝑒 (-∞ ·_e 𝐶)) = -∞)
65		oveq1 7367	. . . . . 6 ⊢ (𝐴 = -∞ → (𝐴 ·_e 𝐵) = (-∞ ·_e 𝐵))
66		oveq1 7367	. . . . . 6 ⊢ (𝐴 = -∞ → (𝐴 ·_e 𝐶) = (-∞ ·_e 𝐶))
67	65, 66	oveq12d 7378	. . . . 5 ⊢ (𝐴 = -∞ → ((𝐴 ·_e 𝐵) +_𝑒 (𝐴 ·_e 𝐶)) = ((-∞ ·_e 𝐵) +_𝑒 (-∞ ·_e 𝐶)))
68		xmulmnf2 13220	. . . . . . 7 ⊢ ((𝐵 ∈ ℝ^* ∧ 0 < 𝐵) → (-∞ ·_e 𝐵) = -∞)
69	2, 68	sylan 581	. . . . . 6 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → (-∞ ·_e 𝐵) = -∞)
70	69	oveq1d 7375	. . . . 5 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → ((-∞ ·_e 𝐵) +_𝑒 (-∞ ·_e 𝐶)) = (-∞ +_𝑒 (-∞ ·_e 𝐶)))
71	67, 70	sylan9eqr 2794	. . . 4 ⊢ ((((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) ∧ 𝐴 = -∞) → ((𝐴 ·_e 𝐵) +_𝑒 (𝐴 ·_e 𝐶)) = (-∞ +_𝑒 (-∞ ·_e 𝐶)))
72		oveq1 7367	. . . . 5 ⊢ (𝐴 = -∞ → (𝐴 ·_e (𝐵 +_𝑒 𝐶)) = (-∞ ·_e (𝐵 +_𝑒 𝐶)))
73		xmulmnf2 13220	. . . . . 6 ⊢ (((𝐵 +_𝑒 𝐶) ∈ ℝ^* ∧ 0 < (𝐵 +_𝑒 𝐶)) → (-∞ ·_e (𝐵 +_𝑒 𝐶)) = -∞)
74	31, 41, 73	syl2an2r 686	. . . . 5 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → (-∞ ·_e (𝐵 +_𝑒 𝐶)) = -∞)
75	72, 74	sylan9eqr 2794	. . . 4 ⊢ ((((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) ∧ 𝐴 = -∞) → (𝐴 ·_e (𝐵 +_𝑒 𝐶)) = -∞)
76	64, 71, 75	3eqtr4rd 2783	. . 3 ⊢ ((((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) ∧ 𝐴 = -∞) → (𝐴 ·_e (𝐵 +_𝑒 𝐶)) = ((𝐴 ·_e 𝐵) +_𝑒 (𝐴 ·_e 𝐶)))
77		simpl1 1193	. . . 4 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → 𝐴 ∈ ℝ^*)
78		elxr 13058	. . . 4 ⊢ (𝐴 ∈ ℝ^* ↔ (𝐴 ∈ ℝ ∨ 𝐴 = +∞ ∨ 𝐴 = -∞))
79	77, 78	sylib 218	. . 3 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → (𝐴 ∈ ℝ ∨ 𝐴 = +∞ ∨ 𝐴 = -∞))
80	7, 45, 76, 79	mpjao3dan 1435	. 2 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 < 𝐵) → (𝐴 ·_e (𝐵 +_𝑒 𝐶)) = ((𝐴 ·_e 𝐵) +_𝑒 (𝐴 ·_e 𝐶)))
81		simp1 1137	. . . . . 6 ⊢ ((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) → 𝐴 ∈ ℝ^*)
82		xmulcl 13216	. . . . . 6 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^) → (𝐴 ·_e 𝐶) ∈ ℝ^)
83	81, 4, 82	syl2anc 585	. . . . 5 ⊢ ((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) → (𝐴 ·_e 𝐶) ∈ ℝ^*)
84	83	adantr 480	. . . 4 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 = 𝐵) → (𝐴 ·_e 𝐶) ∈ ℝ^*)
85		xaddlid 13185	. . . 4 ⊢ ((𝐴 ·_e 𝐶) ∈ ℝ^* → (0 +_𝑒 (𝐴 ·_e 𝐶)) = (𝐴 ·_e 𝐶))
86	84, 85	syl 17	. . 3 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 = 𝐵) → (0 +_𝑒 (𝐴 ·_e 𝐶)) = (𝐴 ·_e 𝐶))
87		oveq2 7368	. . . . . 6 ⊢ (0 = 𝐵 → (𝐴 ·_e 0) = (𝐴 ·_e 𝐵))
88	87	eqcomd 2743	. . . . 5 ⊢ (0 = 𝐵 → (𝐴 ·_e 𝐵) = (𝐴 ·_e 0))
89		xmul01 13210	. . . . . 6 ⊢ (𝐴 ∈ ℝ^* → (𝐴 ·_e 0) = 0)
90	89	3ad2ant1 1134	. . . . 5 ⊢ ((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) → (𝐴 ·_e 0) = 0)
91	88, 90	sylan9eqr 2794	. . . 4 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 = 𝐵) → (𝐴 ·_e 𝐵) = 0)
92	91	oveq1d 7375	. . 3 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 = 𝐵) → ((𝐴 ·_e 𝐵) +_𝑒 (𝐴 ·_e 𝐶)) = (0 +_𝑒 (𝐴 ·_e 𝐶)))
93		oveq1 7367	. . . . . 6 ⊢ (0 = 𝐵 → (0 +_𝑒 𝐶) = (𝐵 +_𝑒 𝐶))
94	93	eqcomd 2743	. . . . 5 ⊢ (0 = 𝐵 → (𝐵 +_𝑒 𝐶) = (0 +_𝑒 𝐶))
95		xaddlid 13185	. . . . . 6 ⊢ (𝐶 ∈ ℝ^* → (0 +_𝑒 𝐶) = 𝐶)
96	4, 95	syl 17	. . . . 5 ⊢ ((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) → (0 +_𝑒 𝐶) = 𝐶)
97	94, 96	sylan9eqr 2794	. . . 4 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 = 𝐵) → (𝐵 +_𝑒 𝐶) = 𝐶)
98	97	oveq2d 7376	. . 3 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 = 𝐵) → (𝐴 ·_e (𝐵 +_𝑒 𝐶)) = (𝐴 ·_e 𝐶))
99	86, 92, 98	3eqtr4rd 2783	. 2 ⊢ (((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) ∧ 0 = 𝐵) → (𝐴 ·_e (𝐵 +_𝑒 𝐶)) = ((𝐴 ·_e 𝐵) +_𝑒 (𝐴 ·_e 𝐶)))
100		simp2r 1202	. . 3 ⊢ ((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) → 0 ≤ 𝐵)
101		xrleloe 13086	. . . 4 ⊢ ((0 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^*) → (0 ≤ 𝐵 ↔ (0 < 𝐵 ∨ 0 = 𝐵)))
102	32, 2, 101	sylancr 588	. . 3 ⊢ ((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) → (0 ≤ 𝐵 ↔ (0 < 𝐵 ∨ 0 = 𝐵)))
103	100, 102	mpbid 232	. 2 ⊢ ((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) → (0 < 𝐵 ∨ 0 = 𝐵))
104	80, 99, 103	mpjaodan 961	1 ⊢ ((𝐴 ∈ ℝ^* ∧ (𝐵 ∈ ℝ^* ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ^* ∧ 0 ≤ 𝐶)) → (𝐴 ·_e (𝐵 +_𝑒 𝐶)) = ((𝐴 ·_e 𝐵) +_𝑒 (𝐴 ·_e 𝐶)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∨ wo 848 ∨ w3o 1086 ∧ w3a 1087 = wceq 1542 ∈ wcel 2114 ≠ wne 2933 class class class wbr 5086 (class class class)co 7360 ℝcr 11028 0cc0 11029 +∞cpnf 11167 -∞cmnf 11168 ℝ^*cxr 11169 < clt 11170 ≤ cle 11171 -_𝑒cxne 13051 +_𝑒 cxad 13052 ·_e cxmu 13053

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5231 ax-nul 5241 ax-pow 5302 ax-pr 5370 ax-un 7682 ax-cnex 11085 ax-resscn 11086 ax-1cn 11087 ax-icn 11088 ax-addcl 11089 ax-addrcl 11090 ax-mulcl 11091 ax-mulrcl 11092 ax-mulcom 11093 ax-addass 11094 ax-mulass 11095 ax-distr 11096 ax-i2m1 11097 ax-1ne0 11098 ax-1rid 11099 ax-rnegex 11100 ax-rrecex 11101 ax-cnre 11102 ax-pre-lttri 11103 ax-pre-lttrn 11104 ax-pre-ltadd 11105 ax-pre-mulgt0 11106

This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5519 df-po 5532 df-so 5533 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-1st 7935 df-2nd 7936 df-er 8636 df-en 8887 df-dom 8888 df-sdom 8889 df-pnf 11172 df-mnf 11173 df-xr 11174 df-ltxr 11175 df-le 11176 df-sub 11370 df-neg 11371 df-xneg 13054 df-xadd 13055 df-xmul 13056

This theorem is referenced by: xadddi2r 13241

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