Theorem rrx2pnecoorneor 49462

Description: If two different points 𝑋 and 𝑌 in a real Euclidean space of dimension 2 are different, then they are different at least at one coordinate. (Contributed by AV, 26-Feb-2023.)

Hypotheses

Ref	Expression
rrx2pnecoorneor.i	⊢ 𝐼 = {1, 2}
rrx2pnecoorneor.b	⊢ 𝑃 = (ℝ ↑m 𝐼)

Assertion

Ref	Expression
rrx2pnecoorneor	⊢ ((𝑋 ∈ 𝑃 ∧ 𝑌 ∈ 𝑃 ∧ 𝑋 ≠ 𝑌) → ((𝑋‘1) ≠ (𝑌‘1) ∨ (𝑋‘2) ≠ (𝑌‘2)))

Proof of Theorem rrx2pnecoorneor

Dummy variable 𝑖 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		rrx2pnecoorneor.i	. . . . . . . . 9 ⊢ 𝐼 = {1, 2}
2	1	raleqi 3319	. . . . . . . 8 ⊢ (∀𝑖 ∈ 𝐼 (𝑋‘𝑖) = (𝑌‘𝑖) ↔ ∀𝑖 ∈ {1, 2} (𝑋‘𝑖) = (𝑌‘𝑖))
3		1ex 11202	. . . . . . . . 9 ⊢ 1 ∈ V
4		2ex 12317	. . . . . . . . 9 ⊢ 2 ∈ V
5		fveq2 6881	. . . . . . . . . 10 ⊢ (𝑖 = 1 → (𝑋‘𝑖) = (𝑋‘1))
6		fveq2 6881	. . . . . . . . . 10 ⊢ (𝑖 = 1 → (𝑌‘𝑖) = (𝑌‘1))
7	5, 6	eqeq12d 2777	. . . . . . . . 9 ⊢ (𝑖 = 1 → ((𝑋‘𝑖) = (𝑌‘𝑖) ↔ (𝑋‘1) = (𝑌‘1)))
8		fveq2 6881	. . . . . . . . . 10 ⊢ (𝑖 = 2 → (𝑋‘𝑖) = (𝑋‘2))
9		fveq2 6881	. . . . . . . . . 10 ⊢ (𝑖 = 2 → (𝑌‘𝑖) = (𝑌‘2))
10	8, 9	eqeq12d 2777	. . . . . . . . 9 ⊢ (𝑖 = 2 → ((𝑋‘𝑖) = (𝑌‘𝑖) ↔ (𝑋‘2) = (𝑌‘2)))
11	3, 4, 7, 10	ralpr 4665	. . . . . . . 8 ⊢ (∀𝑖 ∈ {1, 2} (𝑋‘𝑖) = (𝑌‘𝑖) ↔ ((𝑋‘1) = (𝑌‘1) ∧ (𝑋‘2) = (𝑌‘2)))
12	2, 11	bitri 278	. . . . . . 7 ⊢ (∀𝑖 ∈ 𝐼 (𝑋‘𝑖) = (𝑌‘𝑖) ↔ ((𝑋‘1) = (𝑌‘1) ∧ (𝑋‘2) = (𝑌‘2)))
13	12	bilanri 511	. . . . . 6 ⊢ (((𝑋 ∈ 𝑃 ∧ 𝑌 ∈ 𝑃) ∧ ((𝑋‘1) = (𝑌‘1) ∧ (𝑋‘2) = (𝑌‘2))) → ∀𝑖 ∈ 𝐼 (𝑋‘𝑖) = (𝑌‘𝑖))
14		elmapfn 8861	. . . . . . . . . 10 ⊢ (𝑋 ∈ (ℝ ↑m 𝐼) → 𝑋 Fn 𝐼)
15		rrx2pnecoorneor.b	. . . . . . . . . 10 ⊢ 𝑃 = (ℝ ↑m 𝐼)
16	14, 15	eleq2s 2879	. . . . . . . . 9 ⊢ (𝑋 ∈ 𝑃 → 𝑋 Fn 𝐼)
17		elmapfn 8861	. . . . . . . . . 10 ⊢ (𝑌 ∈ (ℝ ↑m 𝐼) → 𝑌 Fn 𝐼)
18	17, 15	eleq2s 2879	. . . . . . . . 9 ⊢ (𝑌 ∈ 𝑃 → 𝑌 Fn 𝐼)
19	16, 18	anim12i 624	. . . . . . . 8 ⊢ ((𝑋 ∈ 𝑃 ∧ 𝑌 ∈ 𝑃) → (𝑋 Fn 𝐼 ∧ 𝑌 Fn 𝐼))
20	19	adantr 485	. . . . . . 7 ⊢ (((𝑋 ∈ 𝑃 ∧ 𝑌 ∈ 𝑃) ∧ ((𝑋‘1) = (𝑌‘1) ∧ (𝑋‘2) = (𝑌‘2))) → (𝑋 Fn 𝐼 ∧ 𝑌 Fn 𝐼))
21		eqfnfv 7025	. . . . . . 7 ⊢ ((𝑋 Fn 𝐼 ∧ 𝑌 Fn 𝐼) → (𝑋 = 𝑌 ↔ ∀𝑖 ∈ 𝐼 (𝑋‘𝑖) = (𝑌‘𝑖)))
22	20, 21	syl 18	. . . . . 6 ⊢ (((𝑋 ∈ 𝑃 ∧ 𝑌 ∈ 𝑃) ∧ ((𝑋‘1) = (𝑌‘1) ∧ (𝑋‘2) = (𝑌‘2))) → (𝑋 = 𝑌 ↔ ∀𝑖 ∈ 𝐼 (𝑋‘𝑖) = (𝑌‘𝑖)))
23	13, 22	mpbird 260	. . . . 5 ⊢ (((𝑋 ∈ 𝑃 ∧ 𝑌 ∈ 𝑃) ∧ ((𝑋‘1) = (𝑌‘1) ∧ (𝑋‘2) = (𝑌‘2))) → 𝑋 = 𝑌)
24	23	ex 417	. . . 4 ⊢ ((𝑋 ∈ 𝑃 ∧ 𝑌 ∈ 𝑃) → (((𝑋‘1) = (𝑌‘1) ∧ (𝑋‘2) = (𝑌‘2)) → 𝑋 = 𝑌))
25	24	necon3ad 2969	. . 3 ⊢ ((𝑋 ∈ 𝑃 ∧ 𝑌 ∈ 𝑃) → (𝑋 ≠ 𝑌 → ¬ ((𝑋‘1) = (𝑌‘1) ∧ (𝑋‘2) = (𝑌‘2))))
26	25	3impia 1133	. 2 ⊢ ((𝑋 ∈ 𝑃 ∧ 𝑌 ∈ 𝑃 ∧ 𝑋 ≠ 𝑌) → ¬ ((𝑋‘1) = (𝑌‘1) ∧ (𝑋‘2) = (𝑌‘2)))
27		neorian 3051	. 2 ⊢ (((𝑋‘1) ≠ (𝑌‘1) ∨ (𝑋‘2) ≠ (𝑌‘2)) ↔ ¬ ((𝑋‘1) = (𝑌‘1) ∧ (𝑋‘2) = (𝑌‘2)))
28	26, 27	sylibr 237	1 ⊢ ((𝑋 ∈ 𝑃 ∧ 𝑌 ∈ 𝑃 ∧ 𝑋 ≠ 𝑌) → ((𝑋‘1) ≠ (𝑌‘1) ∨ (𝑋‘2) ≠ (𝑌‘2)))

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 209   ∧ wa 400   ∨ wo 860   ∧ w3a 1101   = wceq 1568   ∈ wcel 2141   ≠ wne 2956  ∀wral 3077  {cpr 4590   Fn wfn 6531  ‘cfv 6536  (class class class)co 7410   ↑_m cmap 8823  ℝcr 11098  1c1 11100  2c2 12294

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1823  ax-4 1837  ax-5 1938  ax-6 1995  ax-7 2036  ax-8 2143  ax-9 2151  ax-10 2174  ax-11 2190  ax-12 2211  ax-ext 2733  ax-sep 5256  ax-nul 5268  ax-pow 5336  ax-pr 5404  ax-un 7732  ax-1cn 11157  ax-addcl 11159

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1571  df-fal 1581  df-ex 1808  df-nf 1812  df-sb 2095  df-mo 2565  df-eu 2595  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ne 2957  df-ral 3078  df-rex 3088  df-rab 3415  df-v 3455  df-sbc 3744  df-csb 3853  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-nul 4286  df-if 4487  df-pw 4563  df-sn 4589  df-pr 4591  df-op 4595  df-uni 4872  df-iun 4957  df-br 5109  df-opab 5173  df-mpt 5192  df-id 5556  df-xp 5667  df-rel 5668  df-cnv 5669  df-co 5670  df-dm 5671  df-rn 5672  df-res 5673  df-ima 5674  df-iota 6492  df-fun 6538  df-fn 6539  df-f 6540  df-fv 6544  df-ov 7413  df-oprab 7414  df-mpo 7415  df-1st 7985  df-2nd 7986  df-map 8825  df-2 12302

This theorem is referenced by:  rrx2pnedifcoorneor  49463  inlinecirc02p  49534