Theorem xnn0xadd0 12681

Description: The sum of two extended nonnegative integers is 0 iff each of the two extended nonnegative integers is 0. (Contributed by AV, 14-Dec-2020.)

Assertion

Ref	Expression
xnn0xadd0	⊢ ((𝐴 ∈ ℕ0* ∧ 𝐵 ∈ ℕ0*) → ((𝐴 +𝑒 𝐵) = 0 ↔ (𝐴 = 0 ∧ 𝐵 = 0)))

Proof of Theorem xnn0xadd0

Step	Hyp	Ref	Expression
1		elxnn0 12008	. . . 4 ⊢ (𝐴 ∈ ℕ0* ↔ (𝐴 ∈ ℕ0 ∨ 𝐴 = +∞))
2		elxnn0 12008	. . . . . . 7 ⊢ (𝐵 ∈ ℕ0* ↔ (𝐵 ∈ ℕ0 ∨ 𝐵 = +∞))
3		nn0re 11943	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ ℕ0 → 𝐴 ∈ ℝ)
4		nn0re 11943	. . . . . . . . . . . . 13 ⊢ (𝐵 ∈ ℕ0 → 𝐵 ∈ ℝ)
5		rexadd 12666	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 +𝑒 𝐵) = (𝐴 + 𝐵))
6	3, 4, 5	syl2an 598	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝐵 ∈ ℕ0) → (𝐴 +𝑒 𝐵) = (𝐴 + 𝐵))
7	6	eqeq1d 2760	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝐵 ∈ ℕ0) → ((𝐴 +𝑒 𝐵) = 0 ↔ (𝐴 + 𝐵) = 0))
8		nn0ge0 11959	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ ℕ0 → 0 ≤ 𝐴)
9	3, 8	jca 515	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ ℕ0 → (𝐴 ∈ ℝ ∧ 0 ≤ 𝐴))
10		nn0ge0 11959	. . . . . . . . . . . . 13 ⊢ (𝐵 ∈ ℕ0 → 0 ≤ 𝐵)
11	4, 10	jca 515	. . . . . . . . . . . 12 ⊢ (𝐵 ∈ ℕ0 → (𝐵 ∈ ℝ ∧ 0 ≤ 𝐵))
12		add20 11190	. . . . . . . . . . . 12 ⊢ (((𝐴 ∈ ℝ ∧ 0 ≤ 𝐴) ∧ (𝐵 ∈ ℝ ∧ 0 ≤ 𝐵)) → ((𝐴 + 𝐵) = 0 ↔ (𝐴 = 0 ∧ 𝐵 = 0)))
13	9, 11, 12	syl2an 598	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝐵 ∈ ℕ0) → ((𝐴 + 𝐵) = 0 ↔ (𝐴 = 0 ∧ 𝐵 = 0)))
14	7, 13	bitrd 282	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝐵 ∈ ℕ0) → ((𝐴 +𝑒 𝐵) = 0 ↔ (𝐴 = 0 ∧ 𝐵 = 0)))
15	14	biimpd 232	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝐵 ∈ ℕ0) → ((𝐴 +𝑒 𝐵) = 0 → (𝐴 = 0 ∧ 𝐵 = 0)))
16	15	expcom 417	. . . . . . . 8 ⊢ (𝐵 ∈ ℕ0 → (𝐴 ∈ ℕ0 → ((𝐴 +𝑒 𝐵) = 0 → (𝐴 = 0 ∧ 𝐵 = 0))))
17		oveq2 7158	. . . . . . . . . . . . 13 ⊢ (𝐵 = +∞ → (𝐴 +𝑒 𝐵) = (𝐴 +𝑒 +∞))
18	17	eqeq1d 2760	. . . . . . . . . . . 12 ⊢ (𝐵 = +∞ → ((𝐴 +𝑒 𝐵) = 0 ↔ (𝐴 +𝑒 +∞) = 0))
19	18	adantr 484	. . . . . . . . . . 11 ⊢ ((𝐵 = +∞ ∧ 𝐴 ∈ ℕ0) → ((𝐴 +𝑒 𝐵) = 0 ↔ (𝐴 +𝑒 +∞) = 0))
20		nn0xnn0 12010	. . . . . . . . . . . . . 14 ⊢ (𝐴 ∈ ℕ0 → 𝐴 ∈ ℕ0*)
21		xnn0xrnemnf 12018	. . . . . . . . . . . . . 14 ⊢ (𝐴 ∈ ℕ0* → (𝐴 ∈ ℝ* ∧ 𝐴 ≠ -∞))
22		xaddpnf1 12660	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐴 ≠ -∞) → (𝐴 +𝑒 +∞) = +∞)
23	20, 21, 22	3syl 18	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ ℕ0 → (𝐴 +𝑒 +∞) = +∞)
24	23	adantl 485	. . . . . . . . . . . 12 ⊢ ((𝐵 = +∞ ∧ 𝐴 ∈ ℕ0) → (𝐴 +𝑒 +∞) = +∞)
25	24	eqeq1d 2760	. . . . . . . . . . 11 ⊢ ((𝐵 = +∞ ∧ 𝐴 ∈ ℕ0) → ((𝐴 +𝑒 +∞) = 0 ↔ +∞ = 0))
26	19, 25	bitrd 282	. . . . . . . . . 10 ⊢ ((𝐵 = +∞ ∧ 𝐴 ∈ ℕ0) → ((𝐴 +𝑒 𝐵) = 0 ↔ +∞ = 0))
27		0re 10681	. . . . . . . . . . . . 13 ⊢ 0 ∈ ℝ
28		renepnf 10727	. . . . . . . . . . . . 13 ⊢ (0 ∈ ℝ → 0 ≠ +∞)
29	27, 28	ax-mp 5	. . . . . . . . . . . 12 ⊢ 0 ≠ +∞
30	29	nesymi 3008	. . . . . . . . . . 11 ⊢ ¬ +∞ = 0
31	30	pm2.21i 119	. . . . . . . . . 10 ⊢ (+∞ = 0 → (𝐴 = 0 ∧ 𝐵 = 0))
32	26, 31	syl6bi 256	. . . . . . . . 9 ⊢ ((𝐵 = +∞ ∧ 𝐴 ∈ ℕ0) → ((𝐴 +𝑒 𝐵) = 0 → (𝐴 = 0 ∧ 𝐵 = 0)))
33	32	ex 416	. . . . . . . 8 ⊢ (𝐵 = +∞ → (𝐴 ∈ ℕ0 → ((𝐴 +𝑒 𝐵) = 0 → (𝐴 = 0 ∧ 𝐵 = 0))))
34	16, 33	jaoi 854	. . . . . . 7 ⊢ ((𝐵 ∈ ℕ0 ∨ 𝐵 = +∞) → (𝐴 ∈ ℕ0 → ((𝐴 +𝑒 𝐵) = 0 → (𝐴 = 0 ∧ 𝐵 = 0))))
35	2, 34	sylbi 220	. . . . . 6 ⊢ (𝐵 ∈ ℕ0* → (𝐴 ∈ ℕ0 → ((𝐴 +𝑒 𝐵) = 0 → (𝐴 = 0 ∧ 𝐵 = 0))))
36	35	com12 32	. . . . 5 ⊢ (𝐴 ∈ ℕ0 → (𝐵 ∈ ℕ0* → ((𝐴 +𝑒 𝐵) = 0 → (𝐴 = 0 ∧ 𝐵 = 0))))
37		oveq1 7157	. . . . . . . . 9 ⊢ (𝐴 = +∞ → (𝐴 +𝑒 𝐵) = (+∞ +𝑒 𝐵))
38	37	eqeq1d 2760	. . . . . . . 8 ⊢ (𝐴 = +∞ → ((𝐴 +𝑒 𝐵) = 0 ↔ (+∞ +𝑒 𝐵) = 0))
39		xnn0xrnemnf 12018	. . . . . . . . . 10 ⊢ (𝐵 ∈ ℕ0* → (𝐵 ∈ ℝ* ∧ 𝐵 ≠ -∞))
40		xaddpnf2 12661	. . . . . . . . . 10 ⊢ ((𝐵 ∈ ℝ* ∧ 𝐵 ≠ -∞) → (+∞ +𝑒 𝐵) = +∞)
41	39, 40	syl 17	. . . . . . . . 9 ⊢ (𝐵 ∈ ℕ0* → (+∞ +𝑒 𝐵) = +∞)
42	41	eqeq1d 2760	. . . . . . . 8 ⊢ (𝐵 ∈ ℕ0* → ((+∞ +𝑒 𝐵) = 0 ↔ +∞ = 0))
43	38, 42	sylan9bb 513	. . . . . . 7 ⊢ ((𝐴 = +∞ ∧ 𝐵 ∈ ℕ0*) → ((𝐴 +𝑒 𝐵) = 0 ↔ +∞ = 0))
44	43, 31	syl6bi 256	. . . . . 6 ⊢ ((𝐴 = +∞ ∧ 𝐵 ∈ ℕ0*) → ((𝐴 +𝑒 𝐵) = 0 → (𝐴 = 0 ∧ 𝐵 = 0)))
45	44	ex 416	. . . . 5 ⊢ (𝐴 = +∞ → (𝐵 ∈ ℕ0* → ((𝐴 +𝑒 𝐵) = 0 → (𝐴 = 0 ∧ 𝐵 = 0))))
46	36, 45	jaoi 854	. . . 4 ⊢ ((𝐴 ∈ ℕ0 ∨ 𝐴 = +∞) → (𝐵 ∈ ℕ0* → ((𝐴 +𝑒 𝐵) = 0 → (𝐴 = 0 ∧ 𝐵 = 0))))
47	1, 46	sylbi 220	. . 3 ⊢ (𝐴 ∈ ℕ0* → (𝐵 ∈ ℕ0* → ((𝐴 +𝑒 𝐵) = 0 → (𝐴 = 0 ∧ 𝐵 = 0))))
48	47	imp 410	. 2 ⊢ ((𝐴 ∈ ℕ0* ∧ 𝐵 ∈ ℕ0*) → ((𝐴 +𝑒 𝐵) = 0 → (𝐴 = 0 ∧ 𝐵 = 0)))
49		oveq12 7159	. . 3 ⊢ ((𝐴 = 0 ∧ 𝐵 = 0) → (𝐴 +𝑒 𝐵) = (0 +𝑒 0))
50		0xr 10726	. . . 4 ⊢ 0 ∈ ℝ*
51		xaddid1 12675	. . . 4 ⊢ (0 ∈ ℝ* → (0 +𝑒 0) = 0)
52	50, 51	ax-mp 5	. . 3 ⊢ (0 +𝑒 0) = 0
53	49, 52	eqtrdi 2809	. 2 ⊢ ((𝐴 = 0 ∧ 𝐵 = 0) → (𝐴 +𝑒 𝐵) = 0)
54	48, 53	impbid1 228	1 ⊢ ((𝐴 ∈ ℕ0* ∧ 𝐵 ∈ ℕ0*) → ((𝐴 +𝑒 𝐵) = 0 ↔ (𝐴 = 0 ∧ 𝐵 = 0)))

Syntax hints:   → wi 4   ↔ wb 209   ∧ wa 399   ∨ wo 844   = wceq 1538   ∈ wcel 2111   ≠ wne 2951   class class class wbr 5032  (class class class)co 7150  ℝcr 10574  0cc0 10575   + caddc 10578  +∞cpnf 10710  -∞cmnf 10711  ℝ^*cxr 10712   ≤ cle 10714  ℕ₀cn0 11934  ℕ₀^*cxnn0 12006   +_𝑒 cxad 12546

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 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2729  ax-sep 5169  ax-nul 5176  ax-pow 5234  ax-pr 5298  ax-un 7459  ax-cnex 10631  ax-resscn 10632  ax-1cn 10633  ax-icn 10634  ax-addcl 10635  ax-addrcl 10636  ax-mulcl 10637  ax-mulrcl 10638  ax-mulcom 10639  ax-addass 10640  ax-mulass 10641  ax-distr 10642  ax-i2m1 10643  ax-1ne0 10644  ax-1rid 10645  ax-rnegex 10646  ax-rrecex 10647  ax-cnre 10648  ax-pre-lttri 10649  ax-pre-lttrn 10650  ax-pre-ltadd 10651  ax-pre-mulgt0 10652

This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3or 1085  df-3an 1086  df-tru 1541  df-fal 1551  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2557  df-eu 2588  df-clab 2736  df-cleq 2750  df-clel 2830  df-nfc 2901  df-ne 2952  df-nel 3056  df-ral 3075  df-rex 3076  df-reu 3077  df-rab 3079  df-v 3411  df-sbc 3697  df-csb 3806  df-dif 3861  df-un 3863  df-in 3865  df-ss 3875  df-pss 3877  df-nul 4226  df-if 4421  df-pw 4496  df-sn 4523  df-pr 4525  df-tp 4527  df-op 4529  df-uni 4799  df-iun 4885  df-br 5033  df-opab 5095  df-mpt 5113  df-tr 5139  df-id 5430  df-eprel 5435  df-po 5443  df-so 5444  df-fr 5483  df-we 5485  df-xp 5530  df-rel 5531  df-cnv 5532  df-co 5533  df-dm 5534  df-rn 5535  df-res 5536  df-ima 5537  df-pred 6126  df-ord 6172  df-on 6173  df-lim 6174  df-suc 6175  df-iota 6294  df-fun 6337  df-fn 6338  df-f 6339  df-f1 6340  df-fo 6341  df-f1o 6342  df-fv 6343  df-riota 7108  df-ov 7153  df-oprab 7154  df-mpo 7155  df-om 7580  df-wrecs 7957  df-recs 8018  df-rdg 8056  df-er 8299  df-en 8528  df-dom 8529  df-sdom 8530  df-pnf 10715  df-mnf 10716  df-xr 10717  df-ltxr 10718  df-le 10719  df-sub 10910  df-neg 10911  df-nn 11675  df-n0 11935  df-xnn0 12007  df-xadd 12549

This theorem is referenced by:  vtxd0nedgb  27377