Theorem xnn0xadd0 10248

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 9611	. . . 4 ⊢ (𝐴 ∈ ℕ0* ↔ (𝐴 ∈ ℕ0 ∨ 𝐴 = +∞))
2		elxnn0 9611	. . . . . . 7 ⊢ (𝐵 ∈ ℕ0* ↔ (𝐵 ∈ ℕ0 ∨ 𝐵 = +∞))
3		nn0re 9551	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ ℕ0 → 𝐴 ∈ ℝ)
4		nn0re 9551	. . . . . . . . . . . . 13 ⊢ (𝐵 ∈ ℕ0 → 𝐵 ∈ ℝ)
5		rexadd 10233	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 +𝑒 𝐵) = (𝐴 + 𝐵))
6	3, 4, 5	syl2an 289	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝐵 ∈ ℕ0) → (𝐴 +𝑒 𝐵) = (𝐴 + 𝐵))
7	6	eqeq1d 2247	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝐵 ∈ ℕ0) → ((𝐴 +𝑒 𝐵) = 0 ↔ (𝐴 + 𝐵) = 0))
8		nn0ge0 9567	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ ℕ0 → 0 ≤ 𝐴)
9	3, 8	jca 306	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ ℕ0 → (𝐴 ∈ ℝ ∧ 0 ≤ 𝐴))
10		nn0ge0 9567	. . . . . . . . . . . . 13 ⊢ (𝐵 ∈ ℕ0 → 0 ≤ 𝐵)
11	4, 10	jca 306	. . . . . . . . . . . 12 ⊢ (𝐵 ∈ ℕ0 → (𝐵 ∈ ℝ ∧ 0 ≤ 𝐵))
12		add20 8792	. . . . . . . . . . . 12 ⊢ (((𝐴 ∈ ℝ ∧ 0 ≤ 𝐴) ∧ (𝐵 ∈ ℝ ∧ 0 ≤ 𝐵)) → ((𝐴 + 𝐵) = 0 ↔ (𝐴 = 0 ∧ 𝐵 = 0)))
13	9, 11, 12	syl2an 289	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝐵 ∈ ℕ0) → ((𝐴 + 𝐵) = 0 ↔ (𝐴 = 0 ∧ 𝐵 = 0)))
14	7, 13	bitrd 188	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝐵 ∈ ℕ0) → ((𝐴 +𝑒 𝐵) = 0 ↔ (𝐴 = 0 ∧ 𝐵 = 0)))
15	14	biimpd 144	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝐵 ∈ ℕ0) → ((𝐴 +𝑒 𝐵) = 0 → (𝐴 = 0 ∧ 𝐵 = 0)))
16	15	expcom 116	. . . . . . . 8 ⊢ (𝐵 ∈ ℕ0 → (𝐴 ∈ ℕ0 → ((𝐴 +𝑒 𝐵) = 0 → (𝐴 = 0 ∧ 𝐵 = 0))))
17		oveq2 6083	. . . . . . . . . . . . 13 ⊢ (𝐵 = +∞ → (𝐴 +𝑒 𝐵) = (𝐴 +𝑒 +∞))
18	17	eqeq1d 2247	. . . . . . . . . . . 12 ⊢ (𝐵 = +∞ → ((𝐴 +𝑒 𝐵) = 0 ↔ (𝐴 +𝑒 +∞) = 0))
19	18	adantr 276	. . . . . . . . . . 11 ⊢ ((𝐵 = +∞ ∧ 𝐴 ∈ ℕ0) → ((𝐴 +𝑒 𝐵) = 0 ↔ (𝐴 +𝑒 +∞) = 0))
20		nn0xnn0 9613	. . . . . . . . . . . . . 14 ⊢ (𝐴 ∈ ℕ0 → 𝐴 ∈ ℕ0*)
21		xnn0xrnemnf 9621	. . . . . . . . . . . . . 14 ⊢ (𝐴 ∈ ℕ0* → (𝐴 ∈ ℝ* ∧ 𝐴 ≠ -∞))
22		xaddpnf1 10227	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐴 ≠ -∞) → (𝐴 +𝑒 +∞) = +∞)
23	20, 21, 22	3syl 17	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ ℕ0 → (𝐴 +𝑒 +∞) = +∞)
24	23	adantl 277	. . . . . . . . . . . 12 ⊢ ((𝐵 = +∞ ∧ 𝐴 ∈ ℕ0) → (𝐴 +𝑒 +∞) = +∞)
25	24	eqeq1d 2247	. . . . . . . . . . 11 ⊢ ((𝐵 = +∞ ∧ 𝐴 ∈ ℕ0) → ((𝐴 +𝑒 +∞) = 0 ↔ +∞ = 0))
26	19, 25	bitrd 188	. . . . . . . . . 10 ⊢ ((𝐵 = +∞ ∧ 𝐴 ∈ ℕ0) → ((𝐴 +𝑒 𝐵) = 0 ↔ +∞ = 0))
27		0re 8316	. . . . . . . . . . . . 13 ⊢ 0 ∈ ℝ
28		renepnf 8363	. . . . . . . . . . . . 13 ⊢ (0 ∈ ℝ → 0 ≠ +∞)
29	27, 28	ax-mp 5	. . . . . . . . . . . 12 ⊢ 0 ≠ +∞
30	29	nesymi 2466	. . . . . . . . . . 11 ⊢ ¬ +∞ = 0
31	30	pm2.21i 655	. . . . . . . . . 10 ⊢ (+∞ = 0 → (𝐴 = 0 ∧ 𝐵 = 0))
32	26, 31	biimtrdi 163	. . . . . . . . 9 ⊢ ((𝐵 = +∞ ∧ 𝐴 ∈ ℕ0) → ((𝐴 +𝑒 𝐵) = 0 → (𝐴 = 0 ∧ 𝐵 = 0)))
33	32	ex 115	. . . . . . . 8 ⊢ (𝐵 = +∞ → (𝐴 ∈ ℕ0 → ((𝐴 +𝑒 𝐵) = 0 → (𝐴 = 0 ∧ 𝐵 = 0))))
34	16, 33	jaoi 728	. . . . . . 7 ⊢ ((𝐵 ∈ ℕ0 ∨ 𝐵 = +∞) → (𝐴 ∈ ℕ0 → ((𝐴 +𝑒 𝐵) = 0 → (𝐴 = 0 ∧ 𝐵 = 0))))
35	2, 34	sylbi 121	. . . . . 6 ⊢ (𝐵 ∈ ℕ0* → (𝐴 ∈ ℕ0 → ((𝐴 +𝑒 𝐵) = 0 → (𝐴 = 0 ∧ 𝐵 = 0))))
36	35	com12 30	. . . . 5 ⊢ (𝐴 ∈ ℕ0 → (𝐵 ∈ ℕ0* → ((𝐴 +𝑒 𝐵) = 0 → (𝐴 = 0 ∧ 𝐵 = 0))))
37		oveq1 6082	. . . . . . . . 9 ⊢ (𝐴 = +∞ → (𝐴 +𝑒 𝐵) = (+∞ +𝑒 𝐵))
38	37	eqeq1d 2247	. . . . . . . 8 ⊢ (𝐴 = +∞ → ((𝐴 +𝑒 𝐵) = 0 ↔ (+∞ +𝑒 𝐵) = 0))
39		xnn0xrnemnf 9621	. . . . . . . . . 10 ⊢ (𝐵 ∈ ℕ0* → (𝐵 ∈ ℝ* ∧ 𝐵 ≠ -∞))
40		xaddpnf2 10228	. . . . . . . . . 10 ⊢ ((𝐵 ∈ ℝ* ∧ 𝐵 ≠ -∞) → (+∞ +𝑒 𝐵) = +∞)
41	39, 40	syl 14	. . . . . . . . 9 ⊢ (𝐵 ∈ ℕ0* → (+∞ +𝑒 𝐵) = +∞)
42	41	eqeq1d 2247	. . . . . . . 8 ⊢ (𝐵 ∈ ℕ0* → ((+∞ +𝑒 𝐵) = 0 ↔ +∞ = 0))
43	38, 42	sylan9bb 466	. . . . . . 7 ⊢ ((𝐴 = +∞ ∧ 𝐵 ∈ ℕ0*) → ((𝐴 +𝑒 𝐵) = 0 ↔ +∞ = 0))
44	43, 31	biimtrdi 163	. . . . . 6 ⊢ ((𝐴 = +∞ ∧ 𝐵 ∈ ℕ0*) → ((𝐴 +𝑒 𝐵) = 0 → (𝐴 = 0 ∧ 𝐵 = 0)))
45	44	ex 115	. . . . 5 ⊢ (𝐴 = +∞ → (𝐵 ∈ ℕ0* → ((𝐴 +𝑒 𝐵) = 0 → (𝐴 = 0 ∧ 𝐵 = 0))))
46	36, 45	jaoi 728	. . . 4 ⊢ ((𝐴 ∈ ℕ0 ∨ 𝐴 = +∞) → (𝐵 ∈ ℕ0* → ((𝐴 +𝑒 𝐵) = 0 → (𝐴 = 0 ∧ 𝐵 = 0))))
47	1, 46	sylbi 121	. . 3 ⊢ (𝐴 ∈ ℕ0* → (𝐵 ∈ ℕ0* → ((𝐴 +𝑒 𝐵) = 0 → (𝐴 = 0 ∧ 𝐵 = 0))))
48	47	imp 124	. 2 ⊢ ((𝐴 ∈ ℕ0* ∧ 𝐵 ∈ ℕ0*) → ((𝐴 +𝑒 𝐵) = 0 → (𝐴 = 0 ∧ 𝐵 = 0)))
49		oveq12 6084	. . 3 ⊢ ((𝐴 = 0 ∧ 𝐵 = 0) → (𝐴 +𝑒 𝐵) = (0 +𝑒 0))
50		0xr 8362	. . . 4 ⊢ 0 ∈ ℝ*
51		xaddid1 10243	. . . 4 ⊢ (0 ∈ ℝ* → (0 +𝑒 0) = 0)
52	50, 51	ax-mp 5	. . 3 ⊢ (0 +𝑒 0) = 0
53	49, 52	eqtrdi 2287	. 2 ⊢ ((𝐴 = 0 ∧ 𝐵 = 0) → (𝐴 +𝑒 𝐵) = 0)
54	48, 53	impbid1 142	1 ⊢ ((𝐴 ∈ ℕ0* ∧ 𝐵 ∈ ℕ0*) → ((𝐴 +𝑒 𝐵) = 0 ↔ (𝐴 = 0 ∧ 𝐵 = 0)))

Syntax hints:   → wi 4   ∧ wa 104   ↔ wb 105   ∨ wo 720   = wceq 1402   ∈ wcel 2209   ≠ wne 2420   class class class wbr 4125  (class class class)co 6075  ℝcr 8168  0cc0 8169   + caddc 8172  +∞cpnf 8347  -∞cmnf 8348  ℝ^*cxr 8349   ≤ cle 8351  ℕ₀cn0 9542  ℕ₀^*cxnn0 9609   +_𝑒 cxad 10151

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4244  ax-pow 4306  ax-pr 4341  ax-un 4573  ax-setind 4679  ax-cnex 8260  ax-resscn 8261  ax-1cn 8262  ax-1re 8263  ax-icn 8264  ax-addcl 8265  ax-addrcl 8266  ax-mulcl 8267  ax-addcom 8269  ax-addass 8271  ax-i2m1 8274  ax-0lt1 8275  ax-0id 8277  ax-rnegex 8278  ax-pre-ltirr 8281  ax-pre-ltwlin 8282  ax-pre-lttrn 8283  ax-pre-apti 8284  ax-pre-ltadd 8285

This theorem depends on definitions:  df-bi 117  df-dc 847  df-3or 1010  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-nel 2516  df-ral 2533  df-rex 2534  df-rab 2537  df-v 2823  df-sbc 3052  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-if 3636  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-int 3966  df-br 4126  df-opab 4188  df-id 4433  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-dm 4779  df-iota 5332  df-fun 5374  df-fv 5380  df-ov 6078  df-oprab 6079  df-mpo 6080  df-pnf 8352  df-mnf 8353  df-xr 8354  df-ltxr 8355  df-le 8356  df-inn 9284  df-n0 9543  df-xnn0 9610  df-xadd 10154

This theorem is referenced by: (None)