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Theorem pmtrfmvdn0 19398

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 8450	. 2 ⊢ 2_o ≠ ∅
2		pmtrrn.t	. . . . . . . 8 ⊢ 𝑇 = (pmTrsp‘𝐷)
3		pmtrrn.r	. . . . . . . 8 ⊢ 𝑅 = ran 𝑇
4		eqid 2730	. . . . . . . 8 ⊢ dom (𝐹 ∖ I ) = dom (𝐹 ∖ I )
5	2, 3, 4	pmtrfrn 19394	. . . . . . 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 9086	. . . . 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 8991	. . . 4 ⊢ (dom (𝐹 ∖ I ) ≈ ∅ ↔ dom (𝐹 ∖ I ) = ∅)
11		en0 8991	. . . 4 ⊢ (2_o ≈ ∅ ↔ 2_o = ∅)
12	9, 10, 11	3bitr3g 313	. . 3 ⊢ (𝐹 ∈ 𝑅 → (dom (𝐹 ∖ I ) = ∅ ↔ 2_o = ∅))
13	12	necon3bid 2970	. 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 2926 Vcvv 3450 ∖ cdif 3913 ⊆ wss 3916 ∅c0 4298 class class class wbr 5109 I cid 5534 dom cdm 5640 ran crn 5641 ‘cfv 6513 2_oc2o 8430 ≈ cen 8917 pmTrspcpmtr 19377

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 2702 ax-rep 5236 ax-sep 5253 ax-nul 5263 ax-pow 5322 ax-pr 5389 ax-un 7713

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 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-nfc 2879 df-ne 2927 df-ral 3046 df-rex 3055 df-reu 3357 df-rab 3409 df-v 3452 df-sbc 3756 df-csb 3865 df-dif 3919 df-un 3921 df-in 3923 df-ss 3933 df-pss 3936 df-nul 4299 df-if 4491 df-pw 4567 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-iun 4959 df-br 5110 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5535 df-eprel 5540 df-po 5548 df-so 5549 df-fr 5593 df-we 5595 df-xp 5646 df-rel 5647 df-cnv 5648 df-co 5649 df-dm 5650 df-rn 5651 df-res 5652 df-ima 5653 df-ord 6337 df-on 6338 df-lim 6339 df-suc 6340 df-iota 6466 df-fun 6515 df-fn 6516 df-f 6517 df-f1 6518 df-fo 6519 df-f1o 6520 df-fv 6521 df-om 7845 df-1o 8436 df-2o 8437 df-er 8673 df-en 8921 df-pmtr 19378

This theorem is referenced by: psgnunilem3 19432

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