Theorem xmulasslem 11987

Description: Lemma for xmulass 11989. (Contributed by Mario Carneiro, 20-Aug-2015.)

Hypotheses

Ref	Expression
xmulasslem.1	⊢ (𝑥 = 𝐷 → (𝜓 ↔ 𝑋 = 𝑌))
xmulasslem.2	⊢ (𝑥 = -𝑒𝐷 → (𝜓 ↔ 𝐸 = 𝐹))
xmulasslem.x	⊢ (𝜑 → 𝑋 ∈ ℝ*)
xmulasslem.y	⊢ (𝜑 → 𝑌 ∈ ℝ*)
xmulasslem.d	⊢ (𝜑 → 𝐷 ∈ ℝ*)
xmulasslem.ps	⊢ ((𝜑 ∧ (𝑥 ∈ ℝ* ∧ 0 < 𝑥)) → 𝜓)
xmulasslem.0	⊢ (𝜑 → (𝑥 = 0 → 𝜓))
xmulasslem.e	⊢ (𝜑 → 𝐸 = -𝑒𝑋)
xmulasslem.f	⊢ (𝜑 → 𝐹 = -𝑒𝑌)

Assertion

Ref	Expression
xmulasslem	⊢ (𝜑 → 𝑋 = 𝑌)

Distinct variable groups:   𝑥,𝐷   𝑥,𝐸   𝑥,𝐹   𝜑,𝑥   𝑥,𝑋   𝑥,𝑌

Allowed substitution hint:   𝜓(𝑥)

Proof of Theorem xmulasslem

Step	Hyp	Ref	Expression
1		xmulasslem.d	. . 3 ⊢ (𝜑 → 𝐷 ∈ ℝ*)
2		0xr 9965	. . 3 ⊢ 0 ∈ ℝ*
3		xrltso 11850	. . . 4 ⊢ < Or ℝ*
4		solin 4982	. . . 4 ⊢ (( < Or ℝ* ∧ (𝐷 ∈ ℝ* ∧ 0 ∈ ℝ*)) → (𝐷 < 0 ∨ 𝐷 = 0 ∨ 0 < 𝐷))
5	3, 4	mpan 702	. . 3 ⊢ ((𝐷 ∈ ℝ* ∧ 0 ∈ ℝ*) → (𝐷 < 0 ∨ 𝐷 = 0 ∨ 0 < 𝐷))
6	1, 2, 5	sylancl 693	. 2 ⊢ (𝜑 → (𝐷 < 0 ∨ 𝐷 = 0 ∨ 0 < 𝐷))
7		xlt0neg1 11924	. . . . . 6 ⊢ (𝐷 ∈ ℝ* → (𝐷 < 0 ↔ 0 < -𝑒𝐷))
8	1, 7	syl 17	. . . . 5 ⊢ (𝜑 → (𝐷 < 0 ↔ 0 < -𝑒𝐷))
9		xnegcl 11918	. . . . . . 7 ⊢ (𝐷 ∈ ℝ* → -𝑒𝐷 ∈ ℝ*)
10	1, 9	syl 17	. . . . . 6 ⊢ (𝜑 → -𝑒𝐷 ∈ ℝ*)
11		breq2 4587	. . . . . . . . 9 ⊢ (𝑥 = -𝑒𝐷 → (0 < 𝑥 ↔ 0 < -𝑒𝐷))
12		xmulasslem.2	. . . . . . . . 9 ⊢ (𝑥 = -𝑒𝐷 → (𝜓 ↔ 𝐸 = 𝐹))
13	11, 12	imbi12d 333	. . . . . . . 8 ⊢ (𝑥 = -𝑒𝐷 → ((0 < 𝑥 → 𝜓) ↔ (0 < -𝑒𝐷 → 𝐸 = 𝐹)))
14	13	imbi2d 329	. . . . . . 7 ⊢ (𝑥 = -𝑒𝐷 → ((𝜑 → (0 < 𝑥 → 𝜓)) ↔ (𝜑 → (0 < -𝑒𝐷 → 𝐸 = 𝐹))))
15		xmulasslem.ps	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑥 ∈ ℝ* ∧ 0 < 𝑥)) → 𝜓)
16	15	exp32 629	. . . . . . . 8 ⊢ (𝜑 → (𝑥 ∈ ℝ* → (0 < 𝑥 → 𝜓)))
17	16	com12 32	. . . . . . 7 ⊢ (𝑥 ∈ ℝ* → (𝜑 → (0 < 𝑥 → 𝜓)))
18	14, 17	vtoclga 3245	. . . . . 6 ⊢ (-𝑒𝐷 ∈ ℝ* → (𝜑 → (0 < -𝑒𝐷 → 𝐸 = 𝐹)))
19	10, 18	mpcom 37	. . . . 5 ⊢ (𝜑 → (0 < -𝑒𝐷 → 𝐸 = 𝐹))
20	8, 19	sylbid 229	. . . 4 ⊢ (𝜑 → (𝐷 < 0 → 𝐸 = 𝐹))
21		xmulasslem.e	. . . . . 6 ⊢ (𝜑 → 𝐸 = -𝑒𝑋)
22		xmulasslem.f	. . . . . 6 ⊢ (𝜑 → 𝐹 = -𝑒𝑌)
23	21, 22	eqeq12d 2625	. . . . 5 ⊢ (𝜑 → (𝐸 = 𝐹 ↔ -𝑒𝑋 = -𝑒𝑌))
24		xmulasslem.x	. . . . . 6 ⊢ (𝜑 → 𝑋 ∈ ℝ*)
25		xmulasslem.y	. . . . . 6 ⊢ (𝜑 → 𝑌 ∈ ℝ*)
26		xneg11 11920	. . . . . 6 ⊢ ((𝑋 ∈ ℝ* ∧ 𝑌 ∈ ℝ*) → (-𝑒𝑋 = -𝑒𝑌 ↔ 𝑋 = 𝑌))
27	24, 25, 26	syl2anc 691	. . . . 5 ⊢ (𝜑 → (-𝑒𝑋 = -𝑒𝑌 ↔ 𝑋 = 𝑌))
28	23, 27	bitrd 267	. . . 4 ⊢ (𝜑 → (𝐸 = 𝐹 ↔ 𝑋 = 𝑌))
29	20, 28	sylibd 228	. . 3 ⊢ (𝜑 → (𝐷 < 0 → 𝑋 = 𝑌))
30		eqeq1 2614	. . . . . . 7 ⊢ (𝑥 = 𝐷 → (𝑥 = 0 ↔ 𝐷 = 0))
31		xmulasslem.1	. . . . . . 7 ⊢ (𝑥 = 𝐷 → (𝜓 ↔ 𝑋 = 𝑌))
32	30, 31	imbi12d 333	. . . . . 6 ⊢ (𝑥 = 𝐷 → ((𝑥 = 0 → 𝜓) ↔ (𝐷 = 0 → 𝑋 = 𝑌)))
33	32	imbi2d 329	. . . . 5 ⊢ (𝑥 = 𝐷 → ((𝜑 → (𝑥 = 0 → 𝜓)) ↔ (𝜑 → (𝐷 = 0 → 𝑋 = 𝑌))))
34		xmulasslem.0	. . . . 5 ⊢ (𝜑 → (𝑥 = 0 → 𝜓))
35	33, 34	vtoclg 3239	. . . 4 ⊢ (𝐷 ∈ ℝ* → (𝜑 → (𝐷 = 0 → 𝑋 = 𝑌)))
36	1, 35	mpcom 37	. . 3 ⊢ (𝜑 → (𝐷 = 0 → 𝑋 = 𝑌))
37		breq2 4587	. . . . . . 7 ⊢ (𝑥 = 𝐷 → (0 < 𝑥 ↔ 0 < 𝐷))
38	37, 31	imbi12d 333	. . . . . 6 ⊢ (𝑥 = 𝐷 → ((0 < 𝑥 → 𝜓) ↔ (0 < 𝐷 → 𝑋 = 𝑌)))
39	38	imbi2d 329	. . . . 5 ⊢ (𝑥 = 𝐷 → ((𝜑 → (0 < 𝑥 → 𝜓)) ↔ (𝜑 → (0 < 𝐷 → 𝑋 = 𝑌))))
40	39, 17	vtoclga 3245	. . . 4 ⊢ (𝐷 ∈ ℝ* → (𝜑 → (0 < 𝐷 → 𝑋 = 𝑌)))
41	1, 40	mpcom 37	. . 3 ⊢ (𝜑 → (0 < 𝐷 → 𝑋 = 𝑌))
42	29, 36, 41	3jaod 1384	. 2 ⊢ (𝜑 → ((𝐷 < 0 ∨ 𝐷 = 0 ∨ 0 < 𝐷) → 𝑋 = 𝑌))
43	6, 42	mpd 15	1 ⊢ (𝜑 → 𝑋 = 𝑌)

Syntax hints:   → wi 4   ↔ wb 195   ∧ wa 383   ∨ w3o 1030   = wceq 1475   ∈ wcel 1977   class class class wbr 4583   Or wor 4958  0cc0 9815  ℝ^*cxr 9952   < clt 9953  -_𝑒cxne 11819

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847  ax-cnex 9871  ax-resscn 9872  ax-1cn 9873  ax-icn 9874  ax-addcl 9875  ax-addrcl 9876  ax-mulcl 9877  ax-mulrcl 9878  ax-mulcom 9879  ax-addass 9880  ax-mulass 9881  ax-distr 9882  ax-i2m1 9883  ax-1ne0 9884  ax-1rid 9885  ax-rnegex 9886  ax-rrecex 9887  ax-cnre 9888  ax-pre-lttri 9889  ax-pre-lttrn 9890  ax-pre-ltadd 9891

This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-nel 2783  df-ral 2901  df-rex 2902  df-reu 2903  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-op 4132  df-uni 4373  df-br 4584  df-opab 4644  df-mpt 4645  df-id 4953  df-po 4959  df-so 4960  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-riota 6511  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-er 7629  df-en 7842  df-dom 7843  df-sdom 7844  df-pnf 9955  df-mnf 9956  df-xr 9957  df-ltxr 9958  df-le 9959  df-sub 10147  df-neg 10148  df-xneg 11822

This theorem is referenced by:  xmulass  11989