pmtrfmvdn0 - Metamath Proof Explorer

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Theorem pmtrfmvdn0 19403

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 8421	. 2 ⊢ 2_o ≠ ∅
2		pmtrrn.t	. . . . . . . 8 ⊢ 𝑇 = (pmTrsp‘𝐷)
3		pmtrrn.r	. . . . . . . 8 ⊢ 𝑅 = ran 𝑇
4		eqid 2737	. . . . . . . 8 ⊢ dom (𝐹 ∖ I ) = dom (𝐹 ∖ I )
5	2, 3, 4	pmtrfrn 19399	. . . . . . 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 1145	. . . . 5 ⊢ (𝐹 ∈ 𝑅 → dom (𝐹 ∖ I ) ≈ 2_o)
8		enen1 9057	. . . . 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 8967	. . . 4 ⊢ (dom (𝐹 ∖ I ) ≈ ∅ ↔ dom (𝐹 ∖ I ) = ∅)
11		en0 8967	. . . 4 ⊢ (2_o ≈ ∅ ↔ 2_o = ∅)
12	9, 10, 11	3bitr3g 313	. . 3 ⊢ (𝐹 ∈ 𝑅 → (dom (𝐹 ∖ I ) = ∅ ↔ 2_o = ∅))
13	12	necon3bid 2977	. 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 1087 = wceq 1542 ∈ wcel 2114 ≠ wne 2933 Vcvv 3442 ∖ cdif 3900 ⊆ wss 3903 ∅c0 4287 class class class wbr 5100 I cid 5526 dom cdm 5632 ran crn 5633 ‘cfv 6500 2_oc2o 8401 ≈ cen 8892 pmTrspcpmtr 19382

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5226 ax-sep 5243 ax-nul 5253 ax-pow 5312 ax-pr 5379 ax-un 7690

This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-iun 4950 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5527 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-we 5587 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-ord 6328 df-on 6329 df-lim 6330 df-suc 6331 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-om 7819 df-1o 8407 df-2o 8408 df-er 8645 df-en 8896 df-pmtr 19383

This theorem is referenced by: psgnunilem3 19437

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