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Description: Lemma for pexmidN . (Contributed by NM, 3-Feb-2012) (New usage is discouraged.)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | pexmidlem.l | |- .<_ = ( le ` K ) |
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| pexmidlem.j | |- .\/ = ( join ` K ) |
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| pexmidlem.a | |- A = ( Atoms ` K ) |
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| pexmidlem.p | |- .+ = ( +P ` K ) |
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| pexmidlem.o | |- ._|_ = ( _|_P ` K ) |
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| pexmidlem.m | |- M = ( X .+ { p } ) |
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| Assertion | pexmidlem6N | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> M = X ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pexmidlem.l | |- .<_ = ( le ` K ) |
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| 2 | pexmidlem.j | |- .\/ = ( join ` K ) |
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| 3 | pexmidlem.a | |- A = ( Atoms ` K ) |
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| 4 | pexmidlem.p | |- .+ = ( +P ` K ) |
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| 5 | pexmidlem.o | |- ._|_ = ( _|_P ` K ) |
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| 6 | pexmidlem.m | |- M = ( X .+ { p } ) |
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| 7 | 1 2 3 4 5 6 | pexmidlem5N | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> ( ( ._|_ ` X ) i^i M ) = (/) ) |
| 8 | 7 | 3adantr1 | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> ( ( ._|_ ` X ) i^i M ) = (/) ) |
| 9 | 8 | fveq2d | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> ( ._|_ ` ( ( ._|_ ` X ) i^i M ) ) = ( ._|_ ` (/) ) ) |
| 10 | simpl1 | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> K e. HL ) |
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| 11 | 3 5 | pol0N | |- ( K e. HL -> ( ._|_ ` (/) ) = A ) |
| 12 | 10 11 | syl | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> ( ._|_ ` (/) ) = A ) |
| 13 | 9 12 | eqtrd | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> ( ._|_ ` ( ( ._|_ ` X ) i^i M ) ) = A ) |
| 14 | 13 | ineq1d | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> ( ( ._|_ ` ( ( ._|_ ` X ) i^i M ) ) i^i M ) = ( A i^i M ) ) |
| 15 | simpl2 | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> X C_ A ) |
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| 16 | simpl3 | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> p e. A ) |
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| 17 | 16 | snssd | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> { p } C_ A ) |
| 18 | 3 4 | paddssat | |- ( ( K e. HL /\ X C_ A /\ { p } C_ A ) -> ( X .+ { p } ) C_ A ) |
| 19 | 10 15 17 18 | syl3anc | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> ( X .+ { p } ) C_ A ) |
| 20 | 6 19 | eqsstrid | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> M C_ A ) |
| 21 | 10 15 20 | 3jca | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> ( K e. HL /\ X C_ A /\ M C_ A ) ) |
| 22 | 3 4 | sspadd1 | |- ( ( K e. HL /\ X C_ A /\ { p } C_ A ) -> X C_ ( X .+ { p } ) ) |
| 23 | 10 15 17 22 | syl3anc | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> X C_ ( X .+ { p } ) ) |
| 24 | 23 6 | sseqtrrdi | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> X C_ M ) |
| 25 | simpr1 | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> ( ._|_ ` ( ._|_ ` X ) ) = X ) |
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| 26 | eqid | |- ( PSubCl ` K ) = ( PSubCl ` K ) |
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| 27 | 3 5 26 | ispsubclN | |- ( K e. HL -> ( X e. ( PSubCl ` K ) <-> ( X C_ A /\ ( ._|_ ` ( ._|_ ` X ) ) = X ) ) ) |
| 28 | 10 27 | syl | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> ( X e. ( PSubCl ` K ) <-> ( X C_ A /\ ( ._|_ ` ( ._|_ ` X ) ) = X ) ) ) |
| 29 | 15 25 28 | mpbir2and | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> X e. ( PSubCl ` K ) ) |
| 30 | 3 4 26 | paddatclN | |- ( ( K e. HL /\ X e. ( PSubCl ` K ) /\ p e. A ) -> ( X .+ { p } ) e. ( PSubCl ` K ) ) |
| 31 | 10 29 16 30 | syl3anc | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> ( X .+ { p } ) e. ( PSubCl ` K ) ) |
| 32 | 6 31 | eqeltrid | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> M e. ( PSubCl ` K ) ) |
| 33 | 5 26 | psubcli2N | |- ( ( K e. HL /\ M e. ( PSubCl ` K ) ) -> ( ._|_ ` ( ._|_ ` M ) ) = M ) |
| 34 | 10 32 33 | syl2anc | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> ( ._|_ ` ( ._|_ ` M ) ) = M ) |
| 35 | 24 34 | jca | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> ( X C_ M /\ ( ._|_ ` ( ._|_ ` M ) ) = M ) ) |
| 36 | 3 5 | poml4N | |- ( ( K e. HL /\ X C_ A /\ M C_ A ) -> ( ( X C_ M /\ ( ._|_ ` ( ._|_ ` M ) ) = M ) -> ( ( ._|_ ` ( ( ._|_ ` X ) i^i M ) ) i^i M ) = ( ._|_ ` ( ._|_ ` X ) ) ) ) |
| 37 | 21 35 36 | sylc | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> ( ( ._|_ ` ( ( ._|_ ` X ) i^i M ) ) i^i M ) = ( ._|_ ` ( ._|_ ` X ) ) ) |
| 38 | sseqin2 | |- ( M C_ A <-> ( A i^i M ) = M ) |
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| 39 | 20 38 | sylib | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> ( A i^i M ) = M ) |
| 40 | 14 37 39 | 3eqtr3rd | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> M = ( ._|_ ` ( ._|_ ` X ) ) ) |
| 41 | 40 25 | eqtrd | |- ( ( ( K e. HL /\ X C_ A /\ p e. A ) /\ ( ( ._|_ ` ( ._|_ ` X ) ) = X /\ X =/= (/) /\ -. p e. ( X .+ ( ._|_ ` X ) ) ) ) -> M = X ) |