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Theorem pmtrfmvdn0 17882

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 7569	. 2 ⊢ 2_𝑜 ≠ ∅
2		pmtrrn.t	. . . . . . . 8 ⊢ 𝑇 = (pmTrsp‘𝐷)
3		pmtrrn.r	. . . . . . . 8 ⊢ 𝑅 = ran 𝑇
4		eqid 2622	. . . . . . . 8 ⊢ dom (𝐹 ∖ I ) = dom (𝐹 ∖ I )
5	2, 3, 4	pmtrfrn 17878	. . . . . . 7 ⊢ (𝐹 ∈ 𝑅 → ((𝐷 ∈ V ∧ dom (𝐹 ∖ I ) ⊆ 𝐷 ∧ dom (𝐹 ∖ I ) ≈ 2_𝑜) ∧ 𝐹 = (𝑇‘dom (𝐹 ∖ I ))))
6	5	simpld 475	. . . . . 6 ⊢ (𝐹 ∈ 𝑅 → (𝐷 ∈ V ∧ dom (𝐹 ∖ I ) ⊆ 𝐷 ∧ dom (𝐹 ∖ I ) ≈ 2_𝑜))
7	6	simp3d 1075	. . . . 5 ⊢ (𝐹 ∈ 𝑅 → dom (𝐹 ∖ I ) ≈ 2_𝑜)
8		enen1 8100	. . . . 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 8019	. . . 4 ⊢ (dom (𝐹 ∖ I ) ≈ ∅ ↔ dom (𝐹 ∖ I ) = ∅)
11		en0 8019	. . . 4 ⊢ (2_𝑜 ≈ ∅ ↔ 2_𝑜 = ∅)
12	9, 10, 11	3bitr3g 302	. . 3 ⊢ (𝐹 ∈ 𝑅 → (dom (𝐹 ∖ I ) = ∅ ↔ 2_𝑜 = ∅))
13	12	necon3bid 2838	. 2 ⊢ (𝐹 ∈ 𝑅 → (dom (𝐹 ∖ I ) ≠ ∅ ↔ 2_𝑜 ≠ ∅))
14	1, 13	mpbiri 248	1 ⊢ (𝐹 ∈ 𝑅 → dom (𝐹 ∖ I ) ≠ ∅)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 196 ∧ w3a 1037 = wceq 1483 ∈ wcel 1990 ≠ wne 2794 Vcvv 3200 ∖ cdif 3571 ⊆ wss 3574 ∅c0 3915 class class class wbr 4653 I cid 5023 dom cdm 5114 ran crn 5115 ‘cfv 5888 2_𝑜c2o 7554 ≈ cen 7952 pmTrspcpmtr 17861

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-rep 4771 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949

This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-ral 2917 df-rex 2918 df-reu 2919 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-pss 3590 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-tp 4182 df-op 4184 df-uni 4437 df-iun 4522 df-br 4654 df-opab 4713 df-mpt 4730 df-tr 4753 df-id 5024 df-eprel 5029 df-po 5035 df-so 5036 df-fr 5073 df-we 5075 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-ord 5726 df-on 5727 df-lim 5728 df-suc 5729 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 df-om 7066 df-1o 7560 df-2o 7561 df-er 7742 df-en 7956 df-fin 7959 df-pmtr 17862

This theorem is referenced by: psgnunilem3 17916

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