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Description: Upper bound for the norm of the composition of two bounded linear operators. (Contributed by NM, 10-Mar-2006) (New usage is discouraged.)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | nmoptri.1 | |- S e. BndLinOp |
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| nmoptri.2 | |- T e. BndLinOp |
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| Assertion | nmopcoi | |- ( normop ` ( S o. T ) ) <_ ( ( normop ` S ) x. ( normop ` T ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nmoptri.1 | |- S e. BndLinOp |
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| 2 | nmoptri.2 | |- T e. BndLinOp |
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| 3 | bdopln | |- ( S e. BndLinOp -> S e. LinOp ) |
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| 4 | 1 3 | ax-mp | |- S e. LinOp |
| 5 | bdopln | |- ( T e. BndLinOp -> T e. LinOp ) |
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| 6 | 2 5 | ax-mp | |- T e. LinOp |
| 7 | 4 6 | lnopcoi | |- ( S o. T ) e. LinOp |
| 8 | 7 | lnopfi | |- ( S o. T ) : ~H --> ~H |
| 9 | nmopre | |- ( S e. BndLinOp -> ( normop ` S ) e. RR ) |
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| 10 | 1 9 | ax-mp | |- ( normop ` S ) e. RR |
| 11 | nmopre | |- ( T e. BndLinOp -> ( normop ` T ) e. RR ) |
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| 12 | 2 11 | ax-mp | |- ( normop ` T ) e. RR |
| 13 | 10 12 | remulcli | |- ( ( normop ` S ) x. ( normop ` T ) ) e. RR |
| 14 | 13 | rexri | |- ( ( normop ` S ) x. ( normop ` T ) ) e. RR* |
| 15 | nmopub | |- ( ( ( S o. T ) : ~H --> ~H /\ ( ( normop ` S ) x. ( normop ` T ) ) e. RR* ) -> ( ( normop ` ( S o. T ) ) <_ ( ( normop ` S ) x. ( normop ` T ) ) <-> A. x e. ~H ( ( normh ` x ) <_ 1 -> ( normh ` ( ( S o. T ) ` x ) ) <_ ( ( normop ` S ) x. ( normop ` T ) ) ) ) ) |
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| 16 | 8 14 15 | mp2an | |- ( ( normop ` ( S o. T ) ) <_ ( ( normop ` S ) x. ( normop ` T ) ) <-> A. x e. ~H ( ( normh ` x ) <_ 1 -> ( normh ` ( ( S o. T ) ` x ) ) <_ ( ( normop ` S ) x. ( normop ` T ) ) ) ) |
| 17 | 0le0 | |- 0 <_ 0 |
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| 18 | 17 | a1i | |- ( ( ( normop ` T ) = 0 /\ x e. ~H ) -> 0 <_ 0 ) |
| 19 | 4 6 | lnopco0i | |- ( ( normop ` T ) = 0 -> ( normop ` ( S o. T ) ) = 0 ) |
| 20 | 7 | nmlnop0iHIL | |- ( ( normop ` ( S o. T ) ) = 0 <-> ( S o. T ) = 0hop ) |
| 21 | 19 20 | sylib | |- ( ( normop ` T ) = 0 -> ( S o. T ) = 0hop ) |
| 22 | fveq1 | |- ( ( S o. T ) = 0hop -> ( ( S o. T ) ` x ) = ( 0hop ` x ) ) |
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| 23 | 22 | fveq2d | |- ( ( S o. T ) = 0hop -> ( normh ` ( ( S o. T ) ` x ) ) = ( normh ` ( 0hop ` x ) ) ) |
| 24 | ho0val | |- ( x e. ~H -> ( 0hop ` x ) = 0h ) |
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| 25 | 24 | fveq2d | |- ( x e. ~H -> ( normh ` ( 0hop ` x ) ) = ( normh ` 0h ) ) |
| 26 | norm0 | |- ( normh ` 0h ) = 0 |
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| 27 | 25 26 | eqtrdi | |- ( x e. ~H -> ( normh ` ( 0hop ` x ) ) = 0 ) |
| 28 | 23 27 | sylan9eq | |- ( ( ( S o. T ) = 0hop /\ x e. ~H ) -> ( normh ` ( ( S o. T ) ` x ) ) = 0 ) |
| 29 | 21 28 | sylan | |- ( ( ( normop ` T ) = 0 /\ x e. ~H ) -> ( normh ` ( ( S o. T ) ` x ) ) = 0 ) |
| 30 | oveq2 | |- ( ( normop ` T ) = 0 -> ( ( normop ` S ) x. ( normop ` T ) ) = ( ( normop ` S ) x. 0 ) ) |
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| 31 | 10 | recni | |- ( normop ` S ) e. CC |
| 32 | 31 | mul01i | |- ( ( normop ` S ) x. 0 ) = 0 |
| 33 | 30 32 | eqtrdi | |- ( ( normop ` T ) = 0 -> ( ( normop ` S ) x. ( normop ` T ) ) = 0 ) |
| 34 | 33 | adantr | |- ( ( ( normop ` T ) = 0 /\ x e. ~H ) -> ( ( normop ` S ) x. ( normop ` T ) ) = 0 ) |
| 35 | 18 29 34 | 3brtr4d | |- ( ( ( normop ` T ) = 0 /\ x e. ~H ) -> ( normh ` ( ( S o. T ) ` x ) ) <_ ( ( normop ` S ) x. ( normop ` T ) ) ) |
| 36 | 35 | adantrr | |- ( ( ( normop ` T ) = 0 /\ ( x e. ~H /\ ( normh ` x ) <_ 1 ) ) -> ( normh ` ( ( S o. T ) ` x ) ) <_ ( ( normop ` S ) x. ( normop ` T ) ) ) |
| 37 | df-ne | |- ( ( normop ` T ) =/= 0 <-> -. ( normop ` T ) = 0 ) |
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| 38 | 8 | ffvelcdmi | |- ( x e. ~H -> ( ( S o. T ) ` x ) e. ~H ) |
| 39 | normcl | |- ( ( ( S o. T ) ` x ) e. ~H -> ( normh ` ( ( S o. T ) ` x ) ) e. RR ) |
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| 40 | 38 39 | syl | |- ( x e. ~H -> ( normh ` ( ( S o. T ) ` x ) ) e. RR ) |
| 41 | 40 | recnd | |- ( x e. ~H -> ( normh ` ( ( S o. T ) ` x ) ) e. CC ) |
| 42 | 12 | recni | |- ( normop ` T ) e. CC |
| 43 | divrec2 | |- ( ( ( normh ` ( ( S o. T ) ` x ) ) e. CC /\ ( normop ` T ) e. CC /\ ( normop ` T ) =/= 0 ) -> ( ( normh ` ( ( S o. T ) ` x ) ) / ( normop ` T ) ) = ( ( 1 / ( normop ` T ) ) x. ( normh ` ( ( S o. T ) ` x ) ) ) ) |
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| 44 | 42 43 | mp3an2 | |- ( ( ( normh ` ( ( S o. T ) ` x ) ) e. CC /\ ( normop ` T ) =/= 0 ) -> ( ( normh ` ( ( S o. T ) ` x ) ) / ( normop ` T ) ) = ( ( 1 / ( normop ` T ) ) x. ( normh ` ( ( S o. T ) ` x ) ) ) ) |
| 45 | 41 44 | sylan | |- ( ( x e. ~H /\ ( normop ` T ) =/= 0 ) -> ( ( normh ` ( ( S o. T ) ` x ) ) / ( normop ` T ) ) = ( ( 1 / ( normop ` T ) ) x. ( normh ` ( ( S o. T ) ` x ) ) ) ) |
| 46 | 45 | ancoms | |- ( ( ( normop ` T ) =/= 0 /\ x e. ~H ) -> ( ( normh ` ( ( S o. T ) ` x ) ) / ( normop ` T ) ) = ( ( 1 / ( normop ` T ) ) x. ( normh ` ( ( S o. T ) ` x ) ) ) ) |
| 47 | 12 | rerecclzi | |- ( ( normop ` T ) =/= 0 -> ( 1 / ( normop ` T ) ) e. RR ) |
| 48 | bdopf | |- ( T e. BndLinOp -> T : ~H --> ~H ) |
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| 49 | 2 48 | ax-mp | |- T : ~H --> ~H |
| 50 | nmopgt0 | |- ( T : ~H --> ~H -> ( ( normop ` T ) =/= 0 <-> 0 < ( normop ` T ) ) ) |
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| 51 | 49 50 | ax-mp | |- ( ( normop ` T ) =/= 0 <-> 0 < ( normop ` T ) ) |
| 52 | 12 | recgt0i | |- ( 0 < ( normop ` T ) -> 0 < ( 1 / ( normop ` T ) ) ) |
| 53 | 51 52 | sylbi | |- ( ( normop ` T ) =/= 0 -> 0 < ( 1 / ( normop ` T ) ) ) |
| 54 | 0re | |- 0 e. RR |
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| 55 | ltle | |- ( ( 0 e. RR /\ ( 1 / ( normop ` T ) ) e. RR ) -> ( 0 < ( 1 / ( normop ` T ) ) -> 0 <_ ( 1 / ( normop ` T ) ) ) ) |
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| 56 | 54 55 | mpan | |- ( ( 1 / ( normop ` T ) ) e. RR -> ( 0 < ( 1 / ( normop ` T ) ) -> 0 <_ ( 1 / ( normop ` T ) ) ) ) |
| 57 | 47 53 56 | sylc | |- ( ( normop ` T ) =/= 0 -> 0 <_ ( 1 / ( normop ` T ) ) ) |
| 58 | 47 57 | absidd | |- ( ( normop ` T ) =/= 0 -> ( abs ` ( 1 / ( normop ` T ) ) ) = ( 1 / ( normop ` T ) ) ) |
| 59 | 58 | adantr | |- ( ( ( normop ` T ) =/= 0 /\ x e. ~H ) -> ( abs ` ( 1 / ( normop ` T ) ) ) = ( 1 / ( normop ` T ) ) ) |
| 60 | 59 | oveq1d | |- ( ( ( normop ` T ) =/= 0 /\ x e. ~H ) -> ( ( abs ` ( 1 / ( normop ` T ) ) ) x. ( normh ` ( ( S o. T ) ` x ) ) ) = ( ( 1 / ( normop ` T ) ) x. ( normh ` ( ( S o. T ) ` x ) ) ) ) |
| 61 | 46 60 | eqtr4d | |- ( ( ( normop ` T ) =/= 0 /\ x e. ~H ) -> ( ( normh ` ( ( S o. T ) ` x ) ) / ( normop ` T ) ) = ( ( abs ` ( 1 / ( normop ` T ) ) ) x. ( normh ` ( ( S o. T ) ` x ) ) ) ) |
| 62 | 42 | recclzi | |- ( ( normop ` T ) =/= 0 -> ( 1 / ( normop ` T ) ) e. CC ) |
| 63 | norm-iii | |- ( ( ( 1 / ( normop ` T ) ) e. CC /\ ( ( S o. T ) ` x ) e. ~H ) -> ( normh ` ( ( 1 / ( normop ` T ) ) .h ( ( S o. T ) ` x ) ) ) = ( ( abs ` ( 1 / ( normop ` T ) ) ) x. ( normh ` ( ( S o. T ) ` x ) ) ) ) |
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| 64 | 62 38 63 | syl2an | |- ( ( ( normop ` T ) =/= 0 /\ x e. ~H ) -> ( normh ` ( ( 1 / ( normop ` T ) ) .h ( ( S o. T ) ` x ) ) ) = ( ( abs ` ( 1 / ( normop ` T ) ) ) x. ( normh ` ( ( S o. T ) ` x ) ) ) ) |
| 65 | 61 64 | eqtr4d | |- ( ( ( normop ` T ) =/= 0 /\ x e. ~H ) -> ( ( normh ` ( ( S o. T ) ` x ) ) / ( normop ` T ) ) = ( normh ` ( ( 1 / ( normop ` T ) ) .h ( ( S o. T ) ` x ) ) ) ) |
| 66 | 49 | ffvelcdmi | |- ( x e. ~H -> ( T ` x ) e. ~H ) |
| 67 | 4 | lnopmuli | |- ( ( ( 1 / ( normop ` T ) ) e. CC /\ ( T ` x ) e. ~H ) -> ( S ` ( ( 1 / ( normop ` T ) ) .h ( T ` x ) ) ) = ( ( 1 / ( normop ` T ) ) .h ( S ` ( T ` x ) ) ) ) |
| 68 | 62 66 67 | syl2an | |- ( ( ( normop ` T ) =/= 0 /\ x e. ~H ) -> ( S ` ( ( 1 / ( normop ` T ) ) .h ( T ` x ) ) ) = ( ( 1 / ( normop ` T ) ) .h ( S ` ( T ` x ) ) ) ) |
| 69 | bdopf | |- ( S e. BndLinOp -> S : ~H --> ~H ) |
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| 70 | 1 69 | ax-mp | |- S : ~H --> ~H |
| 71 | 70 49 | hocoi | |- ( x e. ~H -> ( ( S o. T ) ` x ) = ( S ` ( T ` x ) ) ) |
| 72 | 71 | oveq2d | |- ( x e. ~H -> ( ( 1 / ( normop ` T ) ) .h ( ( S o. T ) ` x ) ) = ( ( 1 / ( normop ` T ) ) .h ( S ` ( T ` x ) ) ) ) |
| 73 | 72 | adantl | |- ( ( ( normop ` T ) =/= 0 /\ x e. ~H ) -> ( ( 1 / ( normop ` T ) ) .h ( ( S o. T ) ` x ) ) = ( ( 1 / ( normop ` T ) ) .h ( S ` ( T ` x ) ) ) ) |
| 74 | 68 73 | eqtr4d | |- ( ( ( normop ` T ) =/= 0 /\ x e. ~H ) -> ( S ` ( ( 1 / ( normop ` T ) ) .h ( T ` x ) ) ) = ( ( 1 / ( normop ` T ) ) .h ( ( S o. T ) ` x ) ) ) |
| 75 | 74 | fveq2d | |- ( ( ( normop ` T ) =/= 0 /\ x e. ~H ) -> ( normh ` ( S ` ( ( 1 / ( normop ` T ) ) .h ( T ` x ) ) ) ) = ( normh ` ( ( 1 / ( normop ` T ) ) .h ( ( S o. T ) ` x ) ) ) ) |
| 76 | 65 75 | eqtr4d | |- ( ( ( normop ` T ) =/= 0 /\ x e. ~H ) -> ( ( normh ` ( ( S o. T ) ` x ) ) / ( normop ` T ) ) = ( normh ` ( S ` ( ( 1 / ( normop ` T ) ) .h ( T ` x ) ) ) ) ) |
| 77 | 76 | adantrr | |- ( ( ( normop ` T ) =/= 0 /\ ( x e. ~H /\ ( normh ` x ) <_ 1 ) ) -> ( ( normh ` ( ( S o. T ) ` x ) ) / ( normop ` T ) ) = ( normh ` ( S ` ( ( 1 / ( normop ` T ) ) .h ( T ` x ) ) ) ) ) |
| 78 | hvmulcl | |- ( ( ( 1 / ( normop ` T ) ) e. CC /\ ( T ` x ) e. ~H ) -> ( ( 1 / ( normop ` T ) ) .h ( T ` x ) ) e. ~H ) |
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| 79 | 62 66 78 | syl2an | |- ( ( ( normop ` T ) =/= 0 /\ x e. ~H ) -> ( ( 1 / ( normop ` T ) ) .h ( T ` x ) ) e. ~H ) |
| 80 | 79 | adantrr | |- ( ( ( normop ` T ) =/= 0 /\ ( x e. ~H /\ ( normh ` x ) <_ 1 ) ) -> ( ( 1 / ( normop ` T ) ) .h ( T ` x ) ) e. ~H ) |
| 81 | norm-iii | |- ( ( ( 1 / ( normop ` T ) ) e. CC /\ ( T ` x ) e. ~H ) -> ( normh ` ( ( 1 / ( normop ` T ) ) .h ( T ` x ) ) ) = ( ( abs ` ( 1 / ( normop ` T ) ) ) x. ( normh ` ( T ` x ) ) ) ) |
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| 82 | 62 66 81 | syl2an | |- ( ( ( normop ` T ) =/= 0 /\ x e. ~H ) -> ( normh ` ( ( 1 / ( normop ` T ) ) .h ( T ` x ) ) ) = ( ( abs ` ( 1 / ( normop ` T ) ) ) x. ( normh ` ( T ` x ) ) ) ) |
| 83 | normcl | |- ( ( T ` x ) e. ~H -> ( normh ` ( T ` x ) ) e. RR ) |
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| 84 | 66 83 | syl | |- ( x e. ~H -> ( normh ` ( T ` x ) ) e. RR ) |
| 85 | 84 | recnd | |- ( x e. ~H -> ( normh ` ( T ` x ) ) e. CC ) |
| 86 | divrec2 | |- ( ( ( normh ` ( T ` x ) ) e. CC /\ ( normop ` T ) e. CC /\ ( normop ` T ) =/= 0 ) -> ( ( normh ` ( T ` x ) ) / ( normop ` T ) ) = ( ( 1 / ( normop ` T ) ) x. ( normh ` ( T ` x ) ) ) ) |
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| 87 | 42 86 | mp3an2 | |- ( ( ( normh ` ( T ` x ) ) e. CC /\ ( normop ` T ) =/= 0 ) -> ( ( normh ` ( T ` x ) ) / ( normop ` T ) ) = ( ( 1 / ( normop ` T ) ) x. ( normh ` ( T ` x ) ) ) ) |
| 88 | 85 87 | sylan | |- ( ( x e. ~H /\ ( normop ` T ) =/= 0 ) -> ( ( normh ` ( T ` x ) ) / ( normop ` T ) ) = ( ( 1 / ( normop ` T ) ) x. ( normh ` ( T ` x ) ) ) ) |
| 89 | 88 | ancoms | |- ( ( ( normop ` T ) =/= 0 /\ x e. ~H ) -> ( ( normh ` ( T ` x ) ) / ( normop ` T ) ) = ( ( 1 / ( normop ` T ) ) x. ( normh ` ( T ` x ) ) ) ) |
| 90 | 59 | oveq1d | |- ( ( ( normop ` T ) =/= 0 /\ x e. ~H ) -> ( ( abs ` ( 1 / ( normop ` T ) ) ) x. ( normh ` ( T ` x ) ) ) = ( ( 1 / ( normop ` T ) ) x. ( normh ` ( T ` x ) ) ) ) |
| 91 | 89 90 | eqtr4d | |- ( ( ( normop ` T ) =/= 0 /\ x e. ~H ) -> ( ( normh ` ( T ` x ) ) / ( normop ` T ) ) = ( ( abs ` ( 1 / ( normop ` T ) ) ) x. ( normh ` ( T ` x ) ) ) ) |
| 92 | 82 91 | eqtr4d | |- ( ( ( normop ` T ) =/= 0 /\ x e. ~H ) -> ( normh ` ( ( 1 / ( normop ` T ) ) .h ( T ` x ) ) ) = ( ( normh ` ( T ` x ) ) / ( normop ` T ) ) ) |
| 93 | 92 | adantrr | |- ( ( ( normop ` T ) =/= 0 /\ ( x e. ~H /\ ( normh ` x ) <_ 1 ) ) -> ( normh ` ( ( 1 / ( normop ` T ) ) .h ( T ` x ) ) ) = ( ( normh ` ( T ` x ) ) / ( normop ` T ) ) ) |
| 94 | nmoplb | |- ( ( T : ~H --> ~H /\ x e. ~H /\ ( normh ` x ) <_ 1 ) -> ( normh ` ( T ` x ) ) <_ ( normop ` T ) ) |
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| 95 | 49 94 | mp3an1 | |- ( ( x e. ~H /\ ( normh ` x ) <_ 1 ) -> ( normh ` ( T ` x ) ) <_ ( normop ` T ) ) |
| 96 | 42 | mullidi | |- ( 1 x. ( normop ` T ) ) = ( normop ` T ) |
| 97 | 95 96 | breqtrrdi | |- ( ( x e. ~H /\ ( normh ` x ) <_ 1 ) -> ( normh ` ( T ` x ) ) <_ ( 1 x. ( normop ` T ) ) ) |
| 98 | 97 | adantl | |- ( ( ( normop ` T ) =/= 0 /\ ( x e. ~H /\ ( normh ` x ) <_ 1 ) ) -> ( normh ` ( T ` x ) ) <_ ( 1 x. ( normop ` T ) ) ) |
| 99 | 84 | adantr | |- ( ( x e. ~H /\ ( normop ` T ) =/= 0 ) -> ( normh ` ( T ` x ) ) e. RR ) |
| 100 | 1red | |- ( ( x e. ~H /\ ( normop ` T ) =/= 0 ) -> 1 e. RR ) |
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| 101 | 12 | a1i | |- ( ( x e. ~H /\ ( normop ` T ) =/= 0 ) -> ( normop ` T ) e. RR ) |
| 102 | 51 | biimpi | |- ( ( normop ` T ) =/= 0 -> 0 < ( normop ` T ) ) |
| 103 | 102 | adantl | |- ( ( x e. ~H /\ ( normop ` T ) =/= 0 ) -> 0 < ( normop ` T ) ) |
| 104 | ledivmul2 | |- ( ( ( normh ` ( T ` x ) ) e. RR /\ 1 e. RR /\ ( ( normop ` T ) e. RR /\ 0 < ( normop ` T ) ) ) -> ( ( ( normh ` ( T ` x ) ) / ( normop ` T ) ) <_ 1 <-> ( normh ` ( T ` x ) ) <_ ( 1 x. ( normop ` T ) ) ) ) |
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| 105 | 99 100 101 103 104 | syl112anc | |- ( ( x e. ~H /\ ( normop ` T ) =/= 0 ) -> ( ( ( normh ` ( T ` x ) ) / ( normop ` T ) ) <_ 1 <-> ( normh ` ( T ` x ) ) <_ ( 1 x. ( normop ` T ) ) ) ) |
| 106 | 105 | ancoms | |- ( ( ( normop ` T ) =/= 0 /\ x e. ~H ) -> ( ( ( normh ` ( T ` x ) ) / ( normop ` T ) ) <_ 1 <-> ( normh ` ( T ` x ) ) <_ ( 1 x. ( normop ` T ) ) ) ) |
| 107 | 106 | adantrr | |- ( ( ( normop ` T ) =/= 0 /\ ( x e. ~H /\ ( normh ` x ) <_ 1 ) ) -> ( ( ( normh ` ( T ` x ) ) / ( normop ` T ) ) <_ 1 <-> ( normh ` ( T ` x ) ) <_ ( 1 x. ( normop ` T ) ) ) ) |
| 108 | 98 107 | mpbird | |- ( ( ( normop ` T ) =/= 0 /\ ( x e. ~H /\ ( normh ` x ) <_ 1 ) ) -> ( ( normh ` ( T ` x ) ) / ( normop ` T ) ) <_ 1 ) |
| 109 | 93 108 | eqbrtrd | |- ( ( ( normop ` T ) =/= 0 /\ ( x e. ~H /\ ( normh ` x ) <_ 1 ) ) -> ( normh ` ( ( 1 / ( normop ` T ) ) .h ( T ` x ) ) ) <_ 1 ) |
| 110 | nmoplb | |- ( ( S : ~H --> ~H /\ ( ( 1 / ( normop ` T ) ) .h ( T ` x ) ) e. ~H /\ ( normh ` ( ( 1 / ( normop ` T ) ) .h ( T ` x ) ) ) <_ 1 ) -> ( normh ` ( S ` ( ( 1 / ( normop ` T ) ) .h ( T ` x ) ) ) ) <_ ( normop ` S ) ) |
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| 111 | 70 110 | mp3an1 | |- ( ( ( ( 1 / ( normop ` T ) ) .h ( T ` x ) ) e. ~H /\ ( normh ` ( ( 1 / ( normop ` T ) ) .h ( T ` x ) ) ) <_ 1 ) -> ( normh ` ( S ` ( ( 1 / ( normop ` T ) ) .h ( T ` x ) ) ) ) <_ ( normop ` S ) ) |
| 112 | 80 109 111 | syl2anc | |- ( ( ( normop ` T ) =/= 0 /\ ( x e. ~H /\ ( normh ` x ) <_ 1 ) ) -> ( normh ` ( S ` ( ( 1 / ( normop ` T ) ) .h ( T ` x ) ) ) ) <_ ( normop ` S ) ) |
| 113 | 77 112 | eqbrtrd | |- ( ( ( normop ` T ) =/= 0 /\ ( x e. ~H /\ ( normh ` x ) <_ 1 ) ) -> ( ( normh ` ( ( S o. T ) ` x ) ) / ( normop ` T ) ) <_ ( normop ` S ) ) |
| 114 | 40 | ad2antrl | |- ( ( ( normop ` T ) =/= 0 /\ ( x e. ~H /\ ( normh ` x ) <_ 1 ) ) -> ( normh ` ( ( S o. T ) ` x ) ) e. RR ) |
| 115 | 10 | a1i | |- ( ( ( normop ` T ) =/= 0 /\ ( x e. ~H /\ ( normh ` x ) <_ 1 ) ) -> ( normop ` S ) e. RR ) |
| 116 | 102 | adantr | |- ( ( ( normop ` T ) =/= 0 /\ ( x e. ~H /\ ( normh ` x ) <_ 1 ) ) -> 0 < ( normop ` T ) ) |
| 117 | 116 12 | jctil | |- ( ( ( normop ` T ) =/= 0 /\ ( x e. ~H /\ ( normh ` x ) <_ 1 ) ) -> ( ( normop ` T ) e. RR /\ 0 < ( normop ` T ) ) ) |
| 118 | ledivmul2 | |- ( ( ( normh ` ( ( S o. T ) ` x ) ) e. RR /\ ( normop ` S ) e. RR /\ ( ( normop ` T ) e. RR /\ 0 < ( normop ` T ) ) ) -> ( ( ( normh ` ( ( S o. T ) ` x ) ) / ( normop ` T ) ) <_ ( normop ` S ) <-> ( normh ` ( ( S o. T ) ` x ) ) <_ ( ( normop ` S ) x. ( normop ` T ) ) ) ) |
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| 119 | 114 115 117 118 | syl3anc | |- ( ( ( normop ` T ) =/= 0 /\ ( x e. ~H /\ ( normh ` x ) <_ 1 ) ) -> ( ( ( normh ` ( ( S o. T ) ` x ) ) / ( normop ` T ) ) <_ ( normop ` S ) <-> ( normh ` ( ( S o. T ) ` x ) ) <_ ( ( normop ` S ) x. ( normop ` T ) ) ) ) |
| 120 | 113 119 | mpbid | |- ( ( ( normop ` T ) =/= 0 /\ ( x e. ~H /\ ( normh ` x ) <_ 1 ) ) -> ( normh ` ( ( S o. T ) ` x ) ) <_ ( ( normop ` S ) x. ( normop ` T ) ) ) |
| 121 | 37 120 | sylanbr | |- ( ( -. ( normop ` T ) = 0 /\ ( x e. ~H /\ ( normh ` x ) <_ 1 ) ) -> ( normh ` ( ( S o. T ) ` x ) ) <_ ( ( normop ` S ) x. ( normop ` T ) ) ) |
| 122 | 36 121 | pm2.61ian | |- ( ( x e. ~H /\ ( normh ` x ) <_ 1 ) -> ( normh ` ( ( S o. T ) ` x ) ) <_ ( ( normop ` S ) x. ( normop ` T ) ) ) |
| 123 | 122 | ex | |- ( x e. ~H -> ( ( normh ` x ) <_ 1 -> ( normh ` ( ( S o. T ) ` x ) ) <_ ( ( normop ` S ) x. ( normop ` T ) ) ) ) |
| 124 | 16 123 | mprgbir | |- ( normop ` ( S o. T ) ) <_ ( ( normop ` S ) x. ( normop ` T ) ) |