| Step | Hyp | Ref
 | Expression | 
| 1 |   | eqid 2196 | 
. 2
⊢ (𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾)) ↦ (𝑗 − 𝐾)) = (𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾)) ↦ (𝑗 − 𝐾)) | 
| 2 |   | elfzelz 10100 | 
. . . 4
⊢ (𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾)) → 𝑗 ∈ ℤ) | 
| 3 | 2 | adantl 277 | 
. . 3
⊢ ((𝜑 ∧ 𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾))) → 𝑗 ∈ ℤ) | 
| 4 |   | mptfzshft.1 | 
. . . 4
⊢ (𝜑 → 𝐾 ∈ ℤ) | 
| 5 | 4 | adantr 276 | 
. . 3
⊢ ((𝜑 ∧ 𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾))) → 𝐾 ∈ ℤ) | 
| 6 | 3, 5 | zsubcld 9453 | 
. 2
⊢ ((𝜑 ∧ 𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾))) → (𝑗 − 𝐾) ∈ ℤ) | 
| 7 |   | elfzelz 10100 | 
. . . 4
⊢ (𝑘 ∈ (𝑀...𝑁) → 𝑘 ∈ ℤ) | 
| 8 | 7 | adantl 277 | 
. . 3
⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀...𝑁)) → 𝑘 ∈ ℤ) | 
| 9 | 4 | adantr 276 | 
. . 3
⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀...𝑁)) → 𝐾 ∈ ℤ) | 
| 10 | 8, 9 | zaddcld 9452 | 
. 2
⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀...𝑁)) → (𝑘 + 𝐾) ∈ ℤ) | 
| 11 |   | simprr 531 | 
. . . . . . . 8
⊢ ((𝜑 ∧ (𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾)) ∧ 𝑘 = (𝑗 − 𝐾))) → 𝑘 = (𝑗 − 𝐾)) | 
| 12 | 11 | oveq1d 5937 | 
. . . . . . 7
⊢ ((𝜑 ∧ (𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾)) ∧ 𝑘 = (𝑗 − 𝐾))) → (𝑘 + 𝐾) = ((𝑗 − 𝐾) + 𝐾)) | 
| 13 | 2 | ad2antrl 490 | 
. . . . . . . 8
⊢ ((𝜑 ∧ (𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾)) ∧ 𝑘 = (𝑗 − 𝐾))) → 𝑗 ∈ ℤ) | 
| 14 | 4 | adantr 276 | 
. . . . . . . 8
⊢ ((𝜑 ∧ (𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾)) ∧ 𝑘 = (𝑗 − 𝐾))) → 𝐾 ∈ ℤ) | 
| 15 |   | zcn 9331 | 
. . . . . . . . 9
⊢ (𝑗 ∈ ℤ → 𝑗 ∈
ℂ) | 
| 16 |   | zcn 9331 | 
. . . . . . . . 9
⊢ (𝐾 ∈ ℤ → 𝐾 ∈
ℂ) | 
| 17 |   | npcan 8235 | 
. . . . . . . . 9
⊢ ((𝑗 ∈ ℂ ∧ 𝐾 ∈ ℂ) → ((𝑗 − 𝐾) + 𝐾) = 𝑗) | 
| 18 | 15, 16, 17 | syl2an 289 | 
. . . . . . . 8
⊢ ((𝑗 ∈ ℤ ∧ 𝐾 ∈ ℤ) → ((𝑗 − 𝐾) + 𝐾) = 𝑗) | 
| 19 | 13, 14, 18 | syl2anc 411 | 
. . . . . . 7
⊢ ((𝜑 ∧ (𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾)) ∧ 𝑘 = (𝑗 − 𝐾))) → ((𝑗 − 𝐾) + 𝐾) = 𝑗) | 
| 20 | 12, 19 | eqtr2d 2230 | 
. . . . . 6
⊢ ((𝜑 ∧ (𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾)) ∧ 𝑘 = (𝑗 − 𝐾))) → 𝑗 = (𝑘 + 𝐾)) | 
| 21 |   | simprl 529 | 
. . . . . 6
⊢ ((𝜑 ∧ (𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾)) ∧ 𝑘 = (𝑗 − 𝐾))) → 𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾))) | 
| 22 | 20, 21 | eqeltrrd 2274 | 
. . . . 5
⊢ ((𝜑 ∧ (𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾)) ∧ 𝑘 = (𝑗 − 𝐾))) → (𝑘 + 𝐾) ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾))) | 
| 23 |   | mptfzshft.2 | 
. . . . . . 7
⊢ (𝜑 → 𝑀 ∈ ℤ) | 
| 24 | 23 | adantr 276 | 
. . . . . 6
⊢ ((𝜑 ∧ (𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾)) ∧ 𝑘 = (𝑗 − 𝐾))) → 𝑀 ∈ ℤ) | 
| 25 |   | mptfzshft.3 | 
. . . . . . 7
⊢ (𝜑 → 𝑁 ∈ ℤ) | 
| 26 | 25 | adantr 276 | 
. . . . . 6
⊢ ((𝜑 ∧ (𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾)) ∧ 𝑘 = (𝑗 − 𝐾))) → 𝑁 ∈ ℤ) | 
| 27 | 13, 14 | zsubcld 9453 | 
. . . . . . 7
⊢ ((𝜑 ∧ (𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾)) ∧ 𝑘 = (𝑗 − 𝐾))) → (𝑗 − 𝐾) ∈ ℤ) | 
| 28 | 11, 27 | eqeltrd 2273 | 
. . . . . 6
⊢ ((𝜑 ∧ (𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾)) ∧ 𝑘 = (𝑗 − 𝐾))) → 𝑘 ∈ ℤ) | 
| 29 |   | fzaddel 10134 | 
. . . . . 6
⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝑘 ∈ ℤ ∧ 𝐾 ∈ ℤ)) → (𝑘 ∈ (𝑀...𝑁) ↔ (𝑘 + 𝐾) ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾)))) | 
| 30 | 24, 26, 28, 14, 29 | syl22anc 1250 | 
. . . . 5
⊢ ((𝜑 ∧ (𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾)) ∧ 𝑘 = (𝑗 − 𝐾))) → (𝑘 ∈ (𝑀...𝑁) ↔ (𝑘 + 𝐾) ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾)))) | 
| 31 | 22, 30 | mpbird 167 | 
. . . 4
⊢ ((𝜑 ∧ (𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾)) ∧ 𝑘 = (𝑗 − 𝐾))) → 𝑘 ∈ (𝑀...𝑁)) | 
| 32 | 31, 20 | jca 306 | 
. . 3
⊢ ((𝜑 ∧ (𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾)) ∧ 𝑘 = (𝑗 − 𝐾))) → (𝑘 ∈ (𝑀...𝑁) ∧ 𝑗 = (𝑘 + 𝐾))) | 
| 33 |   | simprr 531 | 
. . . . 5
⊢ ((𝜑 ∧ (𝑘 ∈ (𝑀...𝑁) ∧ 𝑗 = (𝑘 + 𝐾))) → 𝑗 = (𝑘 + 𝐾)) | 
| 34 |   | simprl 529 | 
. . . . . 6
⊢ ((𝜑 ∧ (𝑘 ∈ (𝑀...𝑁) ∧ 𝑗 = (𝑘 + 𝐾))) → 𝑘 ∈ (𝑀...𝑁)) | 
| 35 | 23 | adantr 276 | 
. . . . . . 7
⊢ ((𝜑 ∧ (𝑘 ∈ (𝑀...𝑁) ∧ 𝑗 = (𝑘 + 𝐾))) → 𝑀 ∈ ℤ) | 
| 36 | 25 | adantr 276 | 
. . . . . . 7
⊢ ((𝜑 ∧ (𝑘 ∈ (𝑀...𝑁) ∧ 𝑗 = (𝑘 + 𝐾))) → 𝑁 ∈ ℤ) | 
| 37 | 7 | ad2antrl 490 | 
. . . . . . 7
⊢ ((𝜑 ∧ (𝑘 ∈ (𝑀...𝑁) ∧ 𝑗 = (𝑘 + 𝐾))) → 𝑘 ∈ ℤ) | 
| 38 | 4 | adantr 276 | 
. . . . . . 7
⊢ ((𝜑 ∧ (𝑘 ∈ (𝑀...𝑁) ∧ 𝑗 = (𝑘 + 𝐾))) → 𝐾 ∈ ℤ) | 
| 39 | 35, 36, 37, 38, 29 | syl22anc 1250 | 
. . . . . 6
⊢ ((𝜑 ∧ (𝑘 ∈ (𝑀...𝑁) ∧ 𝑗 = (𝑘 + 𝐾))) → (𝑘 ∈ (𝑀...𝑁) ↔ (𝑘 + 𝐾) ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾)))) | 
| 40 | 34, 39 | mpbid 147 | 
. . . . 5
⊢ ((𝜑 ∧ (𝑘 ∈ (𝑀...𝑁) ∧ 𝑗 = (𝑘 + 𝐾))) → (𝑘 + 𝐾) ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾))) | 
| 41 | 33, 40 | eqeltrd 2273 | 
. . . 4
⊢ ((𝜑 ∧ (𝑘 ∈ (𝑀...𝑁) ∧ 𝑗 = (𝑘 + 𝐾))) → 𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾))) | 
| 42 | 33 | oveq1d 5937 | 
. . . . 5
⊢ ((𝜑 ∧ (𝑘 ∈ (𝑀...𝑁) ∧ 𝑗 = (𝑘 + 𝐾))) → (𝑗 − 𝐾) = ((𝑘 + 𝐾) − 𝐾)) | 
| 43 |   | zcn 9331 | 
. . . . . . 7
⊢ (𝑘 ∈ ℤ → 𝑘 ∈
ℂ) | 
| 44 |   | pncan 8232 | 
. . . . . . 7
⊢ ((𝑘 ∈ ℂ ∧ 𝐾 ∈ ℂ) → ((𝑘 + 𝐾) − 𝐾) = 𝑘) | 
| 45 | 43, 16, 44 | syl2an 289 | 
. . . . . 6
⊢ ((𝑘 ∈ ℤ ∧ 𝐾 ∈ ℤ) → ((𝑘 + 𝐾) − 𝐾) = 𝑘) | 
| 46 | 37, 38, 45 | syl2anc 411 | 
. . . . 5
⊢ ((𝜑 ∧ (𝑘 ∈ (𝑀...𝑁) ∧ 𝑗 = (𝑘 + 𝐾))) → ((𝑘 + 𝐾) − 𝐾) = 𝑘) | 
| 47 | 42, 46 | eqtr2d 2230 | 
. . . 4
⊢ ((𝜑 ∧ (𝑘 ∈ (𝑀...𝑁) ∧ 𝑗 = (𝑘 + 𝐾))) → 𝑘 = (𝑗 − 𝐾)) | 
| 48 | 41, 47 | jca 306 | 
. . 3
⊢ ((𝜑 ∧ (𝑘 ∈ (𝑀...𝑁) ∧ 𝑗 = (𝑘 + 𝐾))) → (𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾)) ∧ 𝑘 = (𝑗 − 𝐾))) | 
| 49 | 32, 48 | impbida 596 | 
. 2
⊢ (𝜑 → ((𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾)) ∧ 𝑘 = (𝑗 − 𝐾)) ↔ (𝑘 ∈ (𝑀...𝑁) ∧ 𝑗 = (𝑘 + 𝐾)))) | 
| 50 | 1, 6, 10, 49 | f1od 6126 | 
1
⊢ (𝜑 → (𝑗 ∈ ((𝑀 + 𝐾)...(𝑁 + 𝐾)) ↦ (𝑗 − 𝐾)):((𝑀 + 𝐾)...(𝑁 + 𝐾))–1-1-onto→(𝑀...𝑁)) |