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Description: A half-open integer range can represent an ordered pair, analogous to fzopth . (Contributed by Alexander van der Vekens, 1-Jul-2018)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | fzoopth | |- ( ( M e. ZZ /\ N e. ZZ /\ M < N ) -> ( ( M ..^ N ) = ( J ..^ K ) <-> ( M = J /\ N = K ) ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fzolb | |- ( M e. ( M ..^ N ) <-> ( M e. ZZ /\ N e. ZZ /\ M < N ) ) |
|
| 2 | 1 | biranri | |- ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> M e. ( M ..^ N ) ) |
| 3 | simpr | |- ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> ( M ..^ N ) = ( J ..^ K ) ) |
|
| 4 | 2 3 | eleqtrd | |- ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> M e. ( J ..^ K ) ) |
| 5 | elfzouz | |- ( M e. ( J ..^ K ) -> M e. ( ZZ>= ` J ) ) |
|
| 6 | uzss | |- ( M e. ( ZZ>= ` J ) -> ( ZZ>= ` M ) C_ ( ZZ>= ` J ) ) |
|
| 7 | 4 5 6 | 3syl | |- ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> ( ZZ>= ` M ) C_ ( ZZ>= ` J ) ) |
| 8 | eleq2 | |- ( ( M ..^ N ) = ( J ..^ K ) -> ( M e. ( M ..^ N ) <-> M e. ( J ..^ K ) ) ) |
|
| 9 | 8 | adantl | |- ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> ( M e. ( M ..^ N ) <-> M e. ( J ..^ K ) ) ) |
| 10 | 2 9 | mpbid | |- ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> M e. ( J ..^ K ) ) |
| 11 | elfzolt3b | |- ( M e. ( J ..^ K ) -> J e. ( J ..^ K ) ) |
|
| 12 | 10 11 | syl | |- ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> J e. ( J ..^ K ) ) |
| 13 | 12 3 | eleqtrrd | |- ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> J e. ( M ..^ N ) ) |
| 14 | elfzouz | |- ( J e. ( M ..^ N ) -> J e. ( ZZ>= ` M ) ) |
|
| 15 | uzss | |- ( J e. ( ZZ>= ` M ) -> ( ZZ>= ` J ) C_ ( ZZ>= ` M ) ) |
|
| 16 | 13 14 15 | 3syl | |- ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> ( ZZ>= ` J ) C_ ( ZZ>= ` M ) ) |
| 17 | 7 16 | eqssd | |- ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> ( ZZ>= ` M ) = ( ZZ>= ` J ) ) |
| 18 | simpl1 | |- ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> M e. ZZ ) |
|
| 19 | uz11 | |- ( M e. ZZ -> ( ( ZZ>= ` M ) = ( ZZ>= ` J ) <-> M = J ) ) |
|
| 20 | 18 19 | syl | |- ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> ( ( ZZ>= ` M ) = ( ZZ>= ` J ) <-> M = J ) ) |
| 21 | 17 20 | mpbid | |- ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> M = J ) |
| 22 | fzoend | |- ( J e. ( J ..^ K ) -> ( K - 1 ) e. ( J ..^ K ) ) |
|
| 23 | elfzoel2 | |- ( ( K - 1 ) e. ( J ..^ K ) -> K e. ZZ ) |
|
| 24 | eleq2 | |- ( ( J ..^ K ) = ( M ..^ N ) -> ( ( K - 1 ) e. ( J ..^ K ) <-> ( K - 1 ) e. ( M ..^ N ) ) ) |
|
| 25 | 24 | eqcoms | |- ( ( M ..^ N ) = ( J ..^ K ) -> ( ( K - 1 ) e. ( J ..^ K ) <-> ( K - 1 ) e. ( M ..^ N ) ) ) |
| 26 | elfzo2 | |- ( ( K - 1 ) e. ( M ..^ N ) <-> ( ( K - 1 ) e. ( ZZ>= ` M ) /\ N e. ZZ /\ ( K - 1 ) < N ) ) |
|
| 27 | simpl | |- ( ( K e. ZZ /\ ( N e. ZZ /\ ( K - 1 ) < N ) ) -> K e. ZZ ) |
|
| 28 | simprl | |- ( ( K e. ZZ /\ ( N e. ZZ /\ ( K - 1 ) < N ) ) -> N e. ZZ ) |
|
| 29 | zlem1lt | |- ( ( K e. ZZ /\ N e. ZZ ) -> ( K <_ N <-> ( K - 1 ) < N ) ) |
|
| 30 | 29 | ancoms | |- ( ( N e. ZZ /\ K e. ZZ ) -> ( K <_ N <-> ( K - 1 ) < N ) ) |
| 31 | 30 | biimprd | |- ( ( N e. ZZ /\ K e. ZZ ) -> ( ( K - 1 ) < N -> K <_ N ) ) |
| 32 | 31 | impancom | |- ( ( N e. ZZ /\ ( K - 1 ) < N ) -> ( K e. ZZ -> K <_ N ) ) |
| 33 | 32 | impcom | |- ( ( K e. ZZ /\ ( N e. ZZ /\ ( K - 1 ) < N ) ) -> K <_ N ) |
| 34 | 27 28 33 | 3jca | |- ( ( K e. ZZ /\ ( N e. ZZ /\ ( K - 1 ) < N ) ) -> ( K e. ZZ /\ N e. ZZ /\ K <_ N ) ) |
| 35 | 34 | expcom | |- ( ( N e. ZZ /\ ( K - 1 ) < N ) -> ( K e. ZZ -> ( K e. ZZ /\ N e. ZZ /\ K <_ N ) ) ) |
| 36 | 35 | 3adant1 | |- ( ( ( K - 1 ) e. ( ZZ>= ` M ) /\ N e. ZZ /\ ( K - 1 ) < N ) -> ( K e. ZZ -> ( K e. ZZ /\ N e. ZZ /\ K <_ N ) ) ) |
| 37 | 36 | a1d | |- ( ( ( K - 1 ) e. ( ZZ>= ` M ) /\ N e. ZZ /\ ( K - 1 ) < N ) -> ( ( M e. ZZ /\ N e. ZZ /\ M < N ) -> ( K e. ZZ -> ( K e. ZZ /\ N e. ZZ /\ K <_ N ) ) ) ) |
| 38 | 26 37 | sylbi | |- ( ( K - 1 ) e. ( M ..^ N ) -> ( ( M e. ZZ /\ N e. ZZ /\ M < N ) -> ( K e. ZZ -> ( K e. ZZ /\ N e. ZZ /\ K <_ N ) ) ) ) |
| 39 | 25 38 | biimtrdi | |- ( ( M ..^ N ) = ( J ..^ K ) -> ( ( K - 1 ) e. ( J ..^ K ) -> ( ( M e. ZZ /\ N e. ZZ /\ M < N ) -> ( K e. ZZ -> ( K e. ZZ /\ N e. ZZ /\ K <_ N ) ) ) ) ) |
| 40 | 39 | com23 | |- ( ( M ..^ N ) = ( J ..^ K ) -> ( ( M e. ZZ /\ N e. ZZ /\ M < N ) -> ( ( K - 1 ) e. ( J ..^ K ) -> ( K e. ZZ -> ( K e. ZZ /\ N e. ZZ /\ K <_ N ) ) ) ) ) |
| 41 | 40 | impcom | |- ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> ( ( K - 1 ) e. ( J ..^ K ) -> ( K e. ZZ -> ( K e. ZZ /\ N e. ZZ /\ K <_ N ) ) ) ) |
| 42 | 41 | com13 | |- ( K e. ZZ -> ( ( K - 1 ) e. ( J ..^ K ) -> ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> ( K e. ZZ /\ N e. ZZ /\ K <_ N ) ) ) ) |
| 43 | 23 42 | mpcom | |- ( ( K - 1 ) e. ( J ..^ K ) -> ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> ( K e. ZZ /\ N e. ZZ /\ K <_ N ) ) ) |
| 44 | 22 43 | syl | |- ( J e. ( J ..^ K ) -> ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> ( K e. ZZ /\ N e. ZZ /\ K <_ N ) ) ) |
| 45 | 12 44 | mpcom | |- ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> ( K e. ZZ /\ N e. ZZ /\ K <_ N ) ) |
| 46 | eluz2 | |- ( N e. ( ZZ>= ` K ) <-> ( K e. ZZ /\ N e. ZZ /\ K <_ N ) ) |
|
| 47 | 46 | biimpri | |- ( ( K e. ZZ /\ N e. ZZ /\ K <_ N ) -> N e. ( ZZ>= ` K ) ) |
| 48 | uzss | |- ( N e. ( ZZ>= ` K ) -> ( ZZ>= ` N ) C_ ( ZZ>= ` K ) ) |
|
| 49 | 45 47 48 | 3syl | |- ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> ( ZZ>= ` N ) C_ ( ZZ>= ` K ) ) |
| 50 | 1 | biimpri | |- ( ( M e. ZZ /\ N e. ZZ /\ M < N ) -> M e. ( M ..^ N ) ) |
| 51 | fzoend | |- ( M e. ( M ..^ N ) -> ( N - 1 ) e. ( M ..^ N ) ) |
|
| 52 | eleq2 | |- ( ( M ..^ N ) = ( J ..^ K ) -> ( ( N - 1 ) e. ( M ..^ N ) <-> ( N - 1 ) e. ( J ..^ K ) ) ) |
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| 53 | elfzo2 | |- ( ( N - 1 ) e. ( J ..^ K ) <-> ( ( N - 1 ) e. ( ZZ>= ` J ) /\ K e. ZZ /\ ( N - 1 ) < K ) ) |
|
| 54 | pm3.2 | |- ( N e. ZZ -> ( ( K e. ZZ /\ ( N - 1 ) < K ) -> ( N e. ZZ /\ ( K e. ZZ /\ ( N - 1 ) < K ) ) ) ) |
|
| 55 | 54 | 3ad2ant2 | |- ( ( M e. ZZ /\ N e. ZZ /\ M < N ) -> ( ( K e. ZZ /\ ( N - 1 ) < K ) -> ( N e. ZZ /\ ( K e. ZZ /\ ( N - 1 ) < K ) ) ) ) |
| 56 | 55 | com12 | |- ( ( K e. ZZ /\ ( N - 1 ) < K ) -> ( ( M e. ZZ /\ N e. ZZ /\ M < N ) -> ( N e. ZZ /\ ( K e. ZZ /\ ( N - 1 ) < K ) ) ) ) |
| 57 | 56 | 3adant1 | |- ( ( ( N - 1 ) e. ( ZZ>= ` J ) /\ K e. ZZ /\ ( N - 1 ) < K ) -> ( ( M e. ZZ /\ N e. ZZ /\ M < N ) -> ( N e. ZZ /\ ( K e. ZZ /\ ( N - 1 ) < K ) ) ) ) |
| 58 | 53 57 | sylbi | |- ( ( N - 1 ) e. ( J ..^ K ) -> ( ( M e. ZZ /\ N e. ZZ /\ M < N ) -> ( N e. ZZ /\ ( K e. ZZ /\ ( N - 1 ) < K ) ) ) ) |
| 59 | 52 58 | biimtrdi | |- ( ( M ..^ N ) = ( J ..^ K ) -> ( ( N - 1 ) e. ( M ..^ N ) -> ( ( M e. ZZ /\ N e. ZZ /\ M < N ) -> ( N e. ZZ /\ ( K e. ZZ /\ ( N - 1 ) < K ) ) ) ) ) |
| 60 | 59 | com3l | |- ( ( N - 1 ) e. ( M ..^ N ) -> ( ( M e. ZZ /\ N e. ZZ /\ M < N ) -> ( ( M ..^ N ) = ( J ..^ K ) -> ( N e. ZZ /\ ( K e. ZZ /\ ( N - 1 ) < K ) ) ) ) ) |
| 61 | 51 60 | syl | |- ( M e. ( M ..^ N ) -> ( ( M e. ZZ /\ N e. ZZ /\ M < N ) -> ( ( M ..^ N ) = ( J ..^ K ) -> ( N e. ZZ /\ ( K e. ZZ /\ ( N - 1 ) < K ) ) ) ) ) |
| 62 | 50 61 | mpcom | |- ( ( M e. ZZ /\ N e. ZZ /\ M < N ) -> ( ( M ..^ N ) = ( J ..^ K ) -> ( N e. ZZ /\ ( K e. ZZ /\ ( N - 1 ) < K ) ) ) ) |
| 63 | 62 | imp | |- ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> ( N e. ZZ /\ ( K e. ZZ /\ ( N - 1 ) < K ) ) ) |
| 64 | simpl | |- ( ( N e. ZZ /\ ( K e. ZZ /\ ( N - 1 ) < K ) ) -> N e. ZZ ) |
|
| 65 | simprl | |- ( ( N e. ZZ /\ ( K e. ZZ /\ ( N - 1 ) < K ) ) -> K e. ZZ ) |
|
| 66 | zlem1lt | |- ( ( N e. ZZ /\ K e. ZZ ) -> ( N <_ K <-> ( N - 1 ) < K ) ) |
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| 67 | 66 | ancoms | |- ( ( K e. ZZ /\ N e. ZZ ) -> ( N <_ K <-> ( N - 1 ) < K ) ) |
| 68 | 67 | biimprd | |- ( ( K e. ZZ /\ N e. ZZ ) -> ( ( N - 1 ) < K -> N <_ K ) ) |
| 69 | 68 | impancom | |- ( ( K e. ZZ /\ ( N - 1 ) < K ) -> ( N e. ZZ -> N <_ K ) ) |
| 70 | 69 | impcom | |- ( ( N e. ZZ /\ ( K e. ZZ /\ ( N - 1 ) < K ) ) -> N <_ K ) |
| 71 | eluz2 | |- ( K e. ( ZZ>= ` N ) <-> ( N e. ZZ /\ K e. ZZ /\ N <_ K ) ) |
|
| 72 | 64 65 70 71 | syl3anbrc | |- ( ( N e. ZZ /\ ( K e. ZZ /\ ( N - 1 ) < K ) ) -> K e. ( ZZ>= ` N ) ) |
| 73 | uzss | |- ( K e. ( ZZ>= ` N ) -> ( ZZ>= ` K ) C_ ( ZZ>= ` N ) ) |
|
| 74 | 63 72 73 | 3syl | |- ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> ( ZZ>= ` K ) C_ ( ZZ>= ` N ) ) |
| 75 | 49 74 | eqssd | |- ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> ( ZZ>= ` N ) = ( ZZ>= ` K ) ) |
| 76 | simpl2 | |- ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> N e. ZZ ) |
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| 77 | uz11 | |- ( N e. ZZ -> ( ( ZZ>= ` N ) = ( ZZ>= ` K ) <-> N = K ) ) |
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| 78 | 76 77 | syl | |- ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> ( ( ZZ>= ` N ) = ( ZZ>= ` K ) <-> N = K ) ) |
| 79 | 75 78 | mpbid | |- ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> N = K ) |
| 80 | 21 79 | jca | |- ( ( ( M e. ZZ /\ N e. ZZ /\ M < N ) /\ ( M ..^ N ) = ( J ..^ K ) ) -> ( M = J /\ N = K ) ) |
| 81 | 80 | ex | |- ( ( M e. ZZ /\ N e. ZZ /\ M < N ) -> ( ( M ..^ N ) = ( J ..^ K ) -> ( M = J /\ N = K ) ) ) |
| 82 | oveq12 | |- ( ( M = J /\ N = K ) -> ( M ..^ N ) = ( J ..^ K ) ) |
|
| 83 | 81 82 | impbid1 | |- ( ( M e. ZZ /\ N e. ZZ /\ M < N ) -> ( ( M ..^ N ) = ( J ..^ K ) <-> ( M = J /\ N = K ) ) ) |