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Theorem pmtrfmvdn0 19392

Description: A transposition moves at least one point. (Contributed by Stefan O'Rear, 23-Aug-2015.)

**Hypotheses**
Ref	Expression
pmtrrn.t	⊢ 𝑇 = (pmTrsp‘𝐷)
pmtrrn.r	⊢ 𝑅 = ran 𝑇

**Assertion**
Ref	Expression
pmtrfmvdn0	⊢ (𝐹 ∈ 𝑅 → dom (𝐹 ∖ I ) ≠ ∅)

**Proof of Theorem pmtrfmvdn0**
Step	Hyp	Ref	Expression
1		2on0 8448	. 2 ⊢ 2_o ≠ ∅
2		pmtrrn.t	. . . . . . . 8 ⊢ 𝑇 = (pmTrsp‘𝐷)
3		pmtrrn.r	. . . . . . . 8 ⊢ 𝑅 = ran 𝑇
4		eqid 2729	. . . . . . . 8 ⊢ dom (𝐹 ∖ I ) = dom (𝐹 ∖ I )
5	2, 3, 4	pmtrfrn 19388	. . . . . . 7 ⊢ (𝐹 ∈ 𝑅 → ((𝐷 ∈ V ∧ dom (𝐹 ∖ I ) ⊆ 𝐷 ∧ dom (𝐹 ∖ I ) ≈ 2_o) ∧ 𝐹 = (𝑇‘dom (𝐹 ∖ I ))))
6	5	simpld 494	. . . . . 6 ⊢ (𝐹 ∈ 𝑅 → (𝐷 ∈ V ∧ dom (𝐹 ∖ I ) ⊆ 𝐷 ∧ dom (𝐹 ∖ I ) ≈ 2_o))
7	6	simp3d 1144	. . . . 5 ⊢ (𝐹 ∈ 𝑅 → dom (𝐹 ∖ I ) ≈ 2_o)
8		enen1 9081	. . . . 5 ⊢ (dom (𝐹 ∖ I ) ≈ 2_o → (dom (𝐹 ∖ I ) ≈ ∅ ↔ 2_o ≈ ∅))
9	7, 8	syl 17	. . . 4 ⊢ (𝐹 ∈ 𝑅 → (dom (𝐹 ∖ I ) ≈ ∅ ↔ 2_o ≈ ∅))
10		en0 8989	. . . 4 ⊢ (dom (𝐹 ∖ I ) ≈ ∅ ↔ dom (𝐹 ∖ I ) = ∅)
11		en0 8989	. . . 4 ⊢ (2_o ≈ ∅ ↔ 2_o = ∅)
12	9, 10, 11	3bitr3g 313	. . 3 ⊢ (𝐹 ∈ 𝑅 → (dom (𝐹 ∖ I ) = ∅ ↔ 2_o = ∅))
13	12	necon3bid 2969	. 2 ⊢ (𝐹 ∈ 𝑅 → (dom (𝐹 ∖ I ) ≠ ∅ ↔ 2_o ≠ ∅))
14	1, 13	mpbiri 258	1 ⊢ (𝐹 ∈ 𝑅 → dom (𝐹 ∖ I ) ≠ ∅)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 206 ∧ w3a 1086 = wceq 1540 ∈ wcel 2109 ≠ wne 2925 Vcvv 3447 ∖ cdif 3911 ⊆ wss 3914 ∅c0 4296 class class class wbr 5107 I cid 5532 dom cdm 5638 ran crn 5639 ‘cfv 6511 2_oc2o 8428 ≈ cen 8915 pmTrspcpmtr 19371

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-rep 5234 ax-sep 5251 ax-nul 5261 ax-pow 5320 ax-pr 5387 ax-un 7711

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-ral 3045 df-rex 3054 df-reu 3355 df-rab 3406 df-v 3449 df-sbc 3754 df-csb 3863 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-pss 3934 df-nul 4297 df-if 4489 df-pw 4565 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4872 df-iun 4957 df-br 5108 df-opab 5170 df-mpt 5189 df-tr 5215 df-id 5533 df-eprel 5538 df-po 5546 df-so 5547 df-fr 5591 df-we 5593 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-rn 5649 df-res 5650 df-ima 5651 df-ord 6335 df-on 6336 df-lim 6337 df-suc 6338 df-iota 6464 df-fun 6513 df-fn 6514 df-f 6515 df-f1 6516 df-fo 6517 df-f1o 6518 df-fv 6519 df-om 7843 df-1o 8434 df-2o 8435 df-er 8671 df-en 8919 df-pmtr 19372

This theorem is referenced by: psgnunilem3 19426

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