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Description: Ordering property for complex exponentiation. (Contributed by Mario Carneiro, 8-Sep-2014)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | cxpaddle.1 | |- ( ph -> A e. RR ) |
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| cxpaddle.2 | |- ( ph -> 0 <_ A ) |
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| cxpaddle.3 | |- ( ph -> B e. RR ) |
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| cxpaddle.4 | |- ( ph -> 0 <_ B ) |
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| cxpaddle.5 | |- ( ph -> C e. RR+ ) |
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| cxpaddle.6 | |- ( ph -> C <_ 1 ) |
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| Assertion | cxpaddle | |- ( ph -> ( ( A + B ) ^c C ) <_ ( ( A ^c C ) + ( B ^c C ) ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cxpaddle.1 | |- ( ph -> A e. RR ) |
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| 2 | cxpaddle.2 | |- ( ph -> 0 <_ A ) |
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| 3 | cxpaddle.3 | |- ( ph -> B e. RR ) |
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| 4 | cxpaddle.4 | |- ( ph -> 0 <_ B ) |
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| 5 | cxpaddle.5 | |- ( ph -> C e. RR+ ) |
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| 6 | cxpaddle.6 | |- ( ph -> C <_ 1 ) |
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| 7 | 1 3 | readdcld | |- ( ph -> ( A + B ) e. RR ) |
| 8 | 1 3 2 4 | addge0d | |- ( ph -> 0 <_ ( A + B ) ) |
| 9 | 5 | rpred | |- ( ph -> C e. RR ) |
| 10 | 7 8 9 | recxpcld | |- ( ph -> ( ( A + B ) ^c C ) e. RR ) |
| 11 | 10 | adantr | |- ( ( ph /\ 0 < ( A + B ) ) -> ( ( A + B ) ^c C ) e. RR ) |
| 12 | 11 | recnd | |- ( ( ph /\ 0 < ( A + B ) ) -> ( ( A + B ) ^c C ) e. CC ) |
| 13 | 12 | mullidd | |- ( ( ph /\ 0 < ( A + B ) ) -> ( 1 x. ( ( A + B ) ^c C ) ) = ( ( A + B ) ^c C ) ) |
| 14 | 1 | adantr | |- ( ( ph /\ 0 < ( A + B ) ) -> A e. RR ) |
| 15 | 7 | anim1i | |- ( ( ph /\ 0 < ( A + B ) ) -> ( ( A + B ) e. RR /\ 0 < ( A + B ) ) ) |
| 16 | elrp | |- ( ( A + B ) e. RR+ <-> ( ( A + B ) e. RR /\ 0 < ( A + B ) ) ) |
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| 17 | 15 16 | sylibr | |- ( ( ph /\ 0 < ( A + B ) ) -> ( A + B ) e. RR+ ) |
| 18 | 14 17 | rerpdivcld | |- ( ( ph /\ 0 < ( A + B ) ) -> ( A / ( A + B ) ) e. RR ) |
| 19 | 3 | adantr | |- ( ( ph /\ 0 < ( A + B ) ) -> B e. RR ) |
| 20 | 19 17 | rerpdivcld | |- ( ( ph /\ 0 < ( A + B ) ) -> ( B / ( A + B ) ) e. RR ) |
| 21 | 2 | adantr | |- ( ( ph /\ 0 < ( A + B ) ) -> 0 <_ A ) |
| 22 | 7 | adantr | |- ( ( ph /\ 0 < ( A + B ) ) -> ( A + B ) e. RR ) |
| 23 | simpr | |- ( ( ph /\ 0 < ( A + B ) ) -> 0 < ( A + B ) ) |
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| 24 | divge0 | |- ( ( ( A e. RR /\ 0 <_ A ) /\ ( ( A + B ) e. RR /\ 0 < ( A + B ) ) ) -> 0 <_ ( A / ( A + B ) ) ) |
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| 25 | 14 21 22 23 24 | syl22anc | |- ( ( ph /\ 0 < ( A + B ) ) -> 0 <_ ( A / ( A + B ) ) ) |
| 26 | 9 | adantr | |- ( ( ph /\ 0 < ( A + B ) ) -> C e. RR ) |
| 27 | 18 25 26 | recxpcld | |- ( ( ph /\ 0 < ( A + B ) ) -> ( ( A / ( A + B ) ) ^c C ) e. RR ) |
| 28 | 4 | adantr | |- ( ( ph /\ 0 < ( A + B ) ) -> 0 <_ B ) |
| 29 | divge0 | |- ( ( ( B e. RR /\ 0 <_ B ) /\ ( ( A + B ) e. RR /\ 0 < ( A + B ) ) ) -> 0 <_ ( B / ( A + B ) ) ) |
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| 30 | 19 28 22 23 29 | syl22anc | |- ( ( ph /\ 0 < ( A + B ) ) -> 0 <_ ( B / ( A + B ) ) ) |
| 31 | 20 30 26 | recxpcld | |- ( ( ph /\ 0 < ( A + B ) ) -> ( ( B / ( A + B ) ) ^c C ) e. RR ) |
| 32 | 1 3 | addge01d | |- ( ph -> ( 0 <_ B <-> A <_ ( A + B ) ) ) |
| 33 | 4 32 | mpbid | |- ( ph -> A <_ ( A + B ) ) |
| 34 | 33 | adantr | |- ( ( ph /\ 0 < ( A + B ) ) -> A <_ ( A + B ) ) |
| 35 | 22 | recnd | |- ( ( ph /\ 0 < ( A + B ) ) -> ( A + B ) e. CC ) |
| 36 | 35 | mulridd | |- ( ( ph /\ 0 < ( A + B ) ) -> ( ( A + B ) x. 1 ) = ( A + B ) ) |
| 37 | 34 36 | breqtrrd | |- ( ( ph /\ 0 < ( A + B ) ) -> A <_ ( ( A + B ) x. 1 ) ) |
| 38 | 1red | |- ( ( ph /\ 0 < ( A + B ) ) -> 1 e. RR ) |
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| 39 | ledivmul | |- ( ( A e. RR /\ 1 e. RR /\ ( ( A + B ) e. RR /\ 0 < ( A + B ) ) ) -> ( ( A / ( A + B ) ) <_ 1 <-> A <_ ( ( A + B ) x. 1 ) ) ) |
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| 40 | 14 38 22 23 39 | syl112anc | |- ( ( ph /\ 0 < ( A + B ) ) -> ( ( A / ( A + B ) ) <_ 1 <-> A <_ ( ( A + B ) x. 1 ) ) ) |
| 41 | 37 40 | mpbird | |- ( ( ph /\ 0 < ( A + B ) ) -> ( A / ( A + B ) ) <_ 1 ) |
| 42 | 5 | adantr | |- ( ( ph /\ 0 < ( A + B ) ) -> C e. RR+ ) |
| 43 | 6 | adantr | |- ( ( ph /\ 0 < ( A + B ) ) -> C <_ 1 ) |
| 44 | 18 25 41 42 43 | cxpaddlelem | |- ( ( ph /\ 0 < ( A + B ) ) -> ( A / ( A + B ) ) <_ ( ( A / ( A + B ) ) ^c C ) ) |
| 45 | 3 1 | addge02d | |- ( ph -> ( 0 <_ A <-> B <_ ( A + B ) ) ) |
| 46 | 2 45 | mpbid | |- ( ph -> B <_ ( A + B ) ) |
| 47 | 46 | adantr | |- ( ( ph /\ 0 < ( A + B ) ) -> B <_ ( A + B ) ) |
| 48 | 47 36 | breqtrrd | |- ( ( ph /\ 0 < ( A + B ) ) -> B <_ ( ( A + B ) x. 1 ) ) |
| 49 | ledivmul | |- ( ( B e. RR /\ 1 e. RR /\ ( ( A + B ) e. RR /\ 0 < ( A + B ) ) ) -> ( ( B / ( A + B ) ) <_ 1 <-> B <_ ( ( A + B ) x. 1 ) ) ) |
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| 50 | 19 38 22 23 49 | syl112anc | |- ( ( ph /\ 0 < ( A + B ) ) -> ( ( B / ( A + B ) ) <_ 1 <-> B <_ ( ( A + B ) x. 1 ) ) ) |
| 51 | 48 50 | mpbird | |- ( ( ph /\ 0 < ( A + B ) ) -> ( B / ( A + B ) ) <_ 1 ) |
| 52 | 20 30 51 42 43 | cxpaddlelem | |- ( ( ph /\ 0 < ( A + B ) ) -> ( B / ( A + B ) ) <_ ( ( B / ( A + B ) ) ^c C ) ) |
| 53 | 18 20 27 31 44 52 | le2addd | |- ( ( ph /\ 0 < ( A + B ) ) -> ( ( A / ( A + B ) ) + ( B / ( A + B ) ) ) <_ ( ( ( A / ( A + B ) ) ^c C ) + ( ( B / ( A + B ) ) ^c C ) ) ) |
| 54 | 14 | recnd | |- ( ( ph /\ 0 < ( A + B ) ) -> A e. CC ) |
| 55 | 19 | recnd | |- ( ( ph /\ 0 < ( A + B ) ) -> B e. CC ) |
| 56 | 17 | rpne0d | |- ( ( ph /\ 0 < ( A + B ) ) -> ( A + B ) =/= 0 ) |
| 57 | 54 55 35 56 | divdird | |- ( ( ph /\ 0 < ( A + B ) ) -> ( ( A + B ) / ( A + B ) ) = ( ( A / ( A + B ) ) + ( B / ( A + B ) ) ) ) |
| 58 | 35 56 | dividd | |- ( ( ph /\ 0 < ( A + B ) ) -> ( ( A + B ) / ( A + B ) ) = 1 ) |
| 59 | 57 58 | eqtr3d | |- ( ( ph /\ 0 < ( A + B ) ) -> ( ( A / ( A + B ) ) + ( B / ( A + B ) ) ) = 1 ) |
| 60 | 9 | recnd | |- ( ph -> C e. CC ) |
| 61 | 60 | adantr | |- ( ( ph /\ 0 < ( A + B ) ) -> C e. CC ) |
| 62 | 14 21 17 61 | divcxpd | |- ( ( ph /\ 0 < ( A + B ) ) -> ( ( A / ( A + B ) ) ^c C ) = ( ( A ^c C ) / ( ( A + B ) ^c C ) ) ) |
| 63 | 19 28 17 61 | divcxpd | |- ( ( ph /\ 0 < ( A + B ) ) -> ( ( B / ( A + B ) ) ^c C ) = ( ( B ^c C ) / ( ( A + B ) ^c C ) ) ) |
| 64 | 62 63 | oveq12d | |- ( ( ph /\ 0 < ( A + B ) ) -> ( ( ( A / ( A + B ) ) ^c C ) + ( ( B / ( A + B ) ) ^c C ) ) = ( ( ( A ^c C ) / ( ( A + B ) ^c C ) ) + ( ( B ^c C ) / ( ( A + B ) ^c C ) ) ) ) |
| 65 | 1 2 9 | recxpcld | |- ( ph -> ( A ^c C ) e. RR ) |
| 66 | 65 | recnd | |- ( ph -> ( A ^c C ) e. CC ) |
| 67 | 66 | adantr | |- ( ( ph /\ 0 < ( A + B ) ) -> ( A ^c C ) e. CC ) |
| 68 | 3 4 9 | recxpcld | |- ( ph -> ( B ^c C ) e. RR ) |
| 69 | 68 | recnd | |- ( ph -> ( B ^c C ) e. CC ) |
| 70 | 69 | adantr | |- ( ( ph /\ 0 < ( A + B ) ) -> ( B ^c C ) e. CC ) |
| 71 | 17 26 | rpcxpcld | |- ( ( ph /\ 0 < ( A + B ) ) -> ( ( A + B ) ^c C ) e. RR+ ) |
| 72 | 71 | rpne0d | |- ( ( ph /\ 0 < ( A + B ) ) -> ( ( A + B ) ^c C ) =/= 0 ) |
| 73 | 67 70 12 72 | divdird | |- ( ( ph /\ 0 < ( A + B ) ) -> ( ( ( A ^c C ) + ( B ^c C ) ) / ( ( A + B ) ^c C ) ) = ( ( ( A ^c C ) / ( ( A + B ) ^c C ) ) + ( ( B ^c C ) / ( ( A + B ) ^c C ) ) ) ) |
| 74 | 64 73 | eqtr4d | |- ( ( ph /\ 0 < ( A + B ) ) -> ( ( ( A / ( A + B ) ) ^c C ) + ( ( B / ( A + B ) ) ^c C ) ) = ( ( ( A ^c C ) + ( B ^c C ) ) / ( ( A + B ) ^c C ) ) ) |
| 75 | 53 59 74 | 3brtr3d | |- ( ( ph /\ 0 < ( A + B ) ) -> 1 <_ ( ( ( A ^c C ) + ( B ^c C ) ) / ( ( A + B ) ^c C ) ) ) |
| 76 | 65 68 | readdcld | |- ( ph -> ( ( A ^c C ) + ( B ^c C ) ) e. RR ) |
| 77 | 76 | adantr | |- ( ( ph /\ 0 < ( A + B ) ) -> ( ( A ^c C ) + ( B ^c C ) ) e. RR ) |
| 78 | 38 77 71 | lemuldivd | |- ( ( ph /\ 0 < ( A + B ) ) -> ( ( 1 x. ( ( A + B ) ^c C ) ) <_ ( ( A ^c C ) + ( B ^c C ) ) <-> 1 <_ ( ( ( A ^c C ) + ( B ^c C ) ) / ( ( A + B ) ^c C ) ) ) ) |
| 79 | 75 78 | mpbird | |- ( ( ph /\ 0 < ( A + B ) ) -> ( 1 x. ( ( A + B ) ^c C ) ) <_ ( ( A ^c C ) + ( B ^c C ) ) ) |
| 80 | 13 79 | eqbrtrrd | |- ( ( ph /\ 0 < ( A + B ) ) -> ( ( A + B ) ^c C ) <_ ( ( A ^c C ) + ( B ^c C ) ) ) |
| 81 | 5 | rpne0d | |- ( ph -> C =/= 0 ) |
| 82 | 60 81 | 0cxpd | |- ( ph -> ( 0 ^c C ) = 0 ) |
| 83 | 1 2 9 | cxpge0d | |- ( ph -> 0 <_ ( A ^c C ) ) |
| 84 | 3 4 9 | cxpge0d | |- ( ph -> 0 <_ ( B ^c C ) ) |
| 85 | 65 68 83 84 | addge0d | |- ( ph -> 0 <_ ( ( A ^c C ) + ( B ^c C ) ) ) |
| 86 | 82 85 | eqbrtrd | |- ( ph -> ( 0 ^c C ) <_ ( ( A ^c C ) + ( B ^c C ) ) ) |
| 87 | oveq1 | |- ( 0 = ( A + B ) -> ( 0 ^c C ) = ( ( A + B ) ^c C ) ) |
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| 88 | 87 | breq1d | |- ( 0 = ( A + B ) -> ( ( 0 ^c C ) <_ ( ( A ^c C ) + ( B ^c C ) ) <-> ( ( A + B ) ^c C ) <_ ( ( A ^c C ) + ( B ^c C ) ) ) ) |
| 89 | 86 88 | syl5ibcom | |- ( ph -> ( 0 = ( A + B ) -> ( ( A + B ) ^c C ) <_ ( ( A ^c C ) + ( B ^c C ) ) ) ) |
| 90 | 89 | imp | |- ( ( ph /\ 0 = ( A + B ) ) -> ( ( A + B ) ^c C ) <_ ( ( A ^c C ) + ( B ^c C ) ) ) |
| 91 | 0re | |- 0 e. RR |
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| 92 | leloe | |- ( ( 0 e. RR /\ ( A + B ) e. RR ) -> ( 0 <_ ( A + B ) <-> ( 0 < ( A + B ) \/ 0 = ( A + B ) ) ) ) |
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| 93 | 91 7 92 | sylancr | |- ( ph -> ( 0 <_ ( A + B ) <-> ( 0 < ( A + B ) \/ 0 = ( A + B ) ) ) ) |
| 94 | 8 93 | mpbid | |- ( ph -> ( 0 < ( A + B ) \/ 0 = ( A + B ) ) ) |
| 95 | 80 90 94 | mpjaodan | |- ( ph -> ( ( A + B ) ^c C ) <_ ( ( A ^c C ) + ( B ^c C ) ) ) |