| Step | Hyp | Ref | Expression | 
|---|
| 1 |  | smonoord.1 | . . 3
⊢ (𝜑 → 𝑁 ∈ (ℤ≥‘(𝑀 + 1))) | 
| 2 |  | eluzfz2 13573 | . . 3
⊢ (𝑁 ∈
(ℤ≥‘(𝑀 + 1)) → 𝑁 ∈ ((𝑀 + 1)...𝑁)) | 
| 3 | 1, 2 | syl 17 | . 2
⊢ (𝜑 → 𝑁 ∈ ((𝑀 + 1)...𝑁)) | 
| 4 |  | eleq1 2828 | . . . . . 6
⊢ (𝑥 = (𝑀 + 1) → (𝑥 ∈ ((𝑀 + 1)...𝑁) ↔ (𝑀 + 1) ∈ ((𝑀 + 1)...𝑁))) | 
| 5 |  | fveq2 6905 | . . . . . . 7
⊢ (𝑥 = (𝑀 + 1) → (𝐹‘𝑥) = (𝐹‘(𝑀 + 1))) | 
| 6 | 5 | breq2d 5154 | . . . . . 6
⊢ (𝑥 = (𝑀 + 1) → ((𝐹‘𝑀) < (𝐹‘𝑥) ↔ (𝐹‘𝑀) < (𝐹‘(𝑀 + 1)))) | 
| 7 | 4, 6 | imbi12d 344 | . . . . 5
⊢ (𝑥 = (𝑀 + 1) → ((𝑥 ∈ ((𝑀 + 1)...𝑁) → (𝐹‘𝑀) < (𝐹‘𝑥)) ↔ ((𝑀 + 1) ∈ ((𝑀 + 1)...𝑁) → (𝐹‘𝑀) < (𝐹‘(𝑀 + 1))))) | 
| 8 | 7 | imbi2d 340 | . . . 4
⊢ (𝑥 = (𝑀 + 1) → ((𝜑 → (𝑥 ∈ ((𝑀 + 1)...𝑁) → (𝐹‘𝑀) < (𝐹‘𝑥))) ↔ (𝜑 → ((𝑀 + 1) ∈ ((𝑀 + 1)...𝑁) → (𝐹‘𝑀) < (𝐹‘(𝑀 + 1)))))) | 
| 9 |  | eleq1 2828 | . . . . . 6
⊢ (𝑥 = 𝑛 → (𝑥 ∈ ((𝑀 + 1)...𝑁) ↔ 𝑛 ∈ ((𝑀 + 1)...𝑁))) | 
| 10 |  | fveq2 6905 | . . . . . . 7
⊢ (𝑥 = 𝑛 → (𝐹‘𝑥) = (𝐹‘𝑛)) | 
| 11 | 10 | breq2d 5154 | . . . . . 6
⊢ (𝑥 = 𝑛 → ((𝐹‘𝑀) < (𝐹‘𝑥) ↔ (𝐹‘𝑀) < (𝐹‘𝑛))) | 
| 12 | 9, 11 | imbi12d 344 | . . . . 5
⊢ (𝑥 = 𝑛 → ((𝑥 ∈ ((𝑀 + 1)...𝑁) → (𝐹‘𝑀) < (𝐹‘𝑥)) ↔ (𝑛 ∈ ((𝑀 + 1)...𝑁) → (𝐹‘𝑀) < (𝐹‘𝑛)))) | 
| 13 | 12 | imbi2d 340 | . . . 4
⊢ (𝑥 = 𝑛 → ((𝜑 → (𝑥 ∈ ((𝑀 + 1)...𝑁) → (𝐹‘𝑀) < (𝐹‘𝑥))) ↔ (𝜑 → (𝑛 ∈ ((𝑀 + 1)...𝑁) → (𝐹‘𝑀) < (𝐹‘𝑛))))) | 
| 14 |  | eleq1 2828 | . . . . . 6
⊢ (𝑥 = (𝑛 + 1) → (𝑥 ∈ ((𝑀 + 1)...𝑁) ↔ (𝑛 + 1) ∈ ((𝑀 + 1)...𝑁))) | 
| 15 |  | fveq2 6905 | . . . . . . 7
⊢ (𝑥 = (𝑛 + 1) → (𝐹‘𝑥) = (𝐹‘(𝑛 + 1))) | 
| 16 | 15 | breq2d 5154 | . . . . . 6
⊢ (𝑥 = (𝑛 + 1) → ((𝐹‘𝑀) < (𝐹‘𝑥) ↔ (𝐹‘𝑀) < (𝐹‘(𝑛 + 1)))) | 
| 17 | 14, 16 | imbi12d 344 | . . . . 5
⊢ (𝑥 = (𝑛 + 1) → ((𝑥 ∈ ((𝑀 + 1)...𝑁) → (𝐹‘𝑀) < (𝐹‘𝑥)) ↔ ((𝑛 + 1) ∈ ((𝑀 + 1)...𝑁) → (𝐹‘𝑀) < (𝐹‘(𝑛 + 1))))) | 
| 18 | 17 | imbi2d 340 | . . . 4
⊢ (𝑥 = (𝑛 + 1) → ((𝜑 → (𝑥 ∈ ((𝑀 + 1)...𝑁) → (𝐹‘𝑀) < (𝐹‘𝑥))) ↔ (𝜑 → ((𝑛 + 1) ∈ ((𝑀 + 1)...𝑁) → (𝐹‘𝑀) < (𝐹‘(𝑛 + 1)))))) | 
| 19 |  | eleq1 2828 | . . . . . 6
⊢ (𝑥 = 𝑁 → (𝑥 ∈ ((𝑀 + 1)...𝑁) ↔ 𝑁 ∈ ((𝑀 + 1)...𝑁))) | 
| 20 |  | fveq2 6905 | . . . . . . 7
⊢ (𝑥 = 𝑁 → (𝐹‘𝑥) = (𝐹‘𝑁)) | 
| 21 | 20 | breq2d 5154 | . . . . . 6
⊢ (𝑥 = 𝑁 → ((𝐹‘𝑀) < (𝐹‘𝑥) ↔ (𝐹‘𝑀) < (𝐹‘𝑁))) | 
| 22 | 19, 21 | imbi12d 344 | . . . . 5
⊢ (𝑥 = 𝑁 → ((𝑥 ∈ ((𝑀 + 1)...𝑁) → (𝐹‘𝑀) < (𝐹‘𝑥)) ↔ (𝑁 ∈ ((𝑀 + 1)...𝑁) → (𝐹‘𝑀) < (𝐹‘𝑁)))) | 
| 23 | 22 | imbi2d 340 | . . . 4
⊢ (𝑥 = 𝑁 → ((𝜑 → (𝑥 ∈ ((𝑀 + 1)...𝑁) → (𝐹‘𝑀) < (𝐹‘𝑥))) ↔ (𝜑 → (𝑁 ∈ ((𝑀 + 1)...𝑁) → (𝐹‘𝑀) < (𝐹‘𝑁))))) | 
| 24 |  | smonoord.0 | . . . . . . . . 9
⊢ (𝜑 → 𝑀 ∈ ℤ) | 
| 25 |  | eluzp1m1 12905 | . . . . . . . . 9
⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈
(ℤ≥‘(𝑀 + 1))) → (𝑁 − 1) ∈
(ℤ≥‘𝑀)) | 
| 26 | 24, 1, 25 | syl2anc 584 | . . . . . . . 8
⊢ (𝜑 → (𝑁 − 1) ∈
(ℤ≥‘𝑀)) | 
| 27 |  | eluzfz1 13572 | . . . . . . . 8
⊢ ((𝑁 − 1) ∈
(ℤ≥‘𝑀) → 𝑀 ∈ (𝑀...(𝑁 − 1))) | 
| 28 | 26, 27 | syl 17 | . . . . . . 7
⊢ (𝜑 → 𝑀 ∈ (𝑀...(𝑁 − 1))) | 
| 29 |  | smonoord.3 | . . . . . . . 8
⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀...(𝑁 − 1))) → (𝐹‘𝑘) < (𝐹‘(𝑘 + 1))) | 
| 30 | 29 | ralrimiva 3145 | . . . . . . 7
⊢ (𝜑 → ∀𝑘 ∈ (𝑀...(𝑁 − 1))(𝐹‘𝑘) < (𝐹‘(𝑘 + 1))) | 
| 31 |  | fveq2 6905 | . . . . . . . . 9
⊢ (𝑘 = 𝑀 → (𝐹‘𝑘) = (𝐹‘𝑀)) | 
| 32 |  | fvoveq1 7455 | . . . . . . . . 9
⊢ (𝑘 = 𝑀 → (𝐹‘(𝑘 + 1)) = (𝐹‘(𝑀 + 1))) | 
| 33 | 31, 32 | breq12d 5155 | . . . . . . . 8
⊢ (𝑘 = 𝑀 → ((𝐹‘𝑘) < (𝐹‘(𝑘 + 1)) ↔ (𝐹‘𝑀) < (𝐹‘(𝑀 + 1)))) | 
| 34 | 33 | rspcv 3617 | . . . . . . 7
⊢ (𝑀 ∈ (𝑀...(𝑁 − 1)) → (∀𝑘 ∈ (𝑀...(𝑁 − 1))(𝐹‘𝑘) < (𝐹‘(𝑘 + 1)) → (𝐹‘𝑀) < (𝐹‘(𝑀 + 1)))) | 
| 35 | 28, 30, 34 | sylc 65 | . . . . . 6
⊢ (𝜑 → (𝐹‘𝑀) < (𝐹‘(𝑀 + 1))) | 
| 36 | 35 | a1d 25 | . . . . 5
⊢ (𝜑 → ((𝑀 + 1) ∈ ((𝑀 + 1)...𝑁) → (𝐹‘𝑀) < (𝐹‘(𝑀 + 1)))) | 
| 37 | 36 | a1i 11 | . . . 4
⊢ ((𝑀 + 1) ∈ ℤ →
(𝜑 → ((𝑀 + 1) ∈ ((𝑀 + 1)...𝑁) → (𝐹‘𝑀) < (𝐹‘(𝑀 + 1))))) | 
| 38 |  | peano2fzr 13578 | . . . . . . . 8
⊢ ((𝑛 ∈
(ℤ≥‘(𝑀 + 1)) ∧ (𝑛 + 1) ∈ ((𝑀 + 1)...𝑁)) → 𝑛 ∈ ((𝑀 + 1)...𝑁)) | 
| 39 | 38 | adantll 714 | . . . . . . 7
⊢ (((𝜑 ∧ 𝑛 ∈ (ℤ≥‘(𝑀 + 1))) ∧ (𝑛 + 1) ∈ ((𝑀 + 1)...𝑁)) → 𝑛 ∈ ((𝑀 + 1)...𝑁)) | 
| 40 | 39 | ex 412 | . . . . . 6
⊢ ((𝜑 ∧ 𝑛 ∈ (ℤ≥‘(𝑀 + 1))) → ((𝑛 + 1) ∈ ((𝑀 + 1)...𝑁) → 𝑛 ∈ ((𝑀 + 1)...𝑁))) | 
| 41 | 40 | imim1d 82 | . . . . 5
⊢ ((𝜑 ∧ 𝑛 ∈ (ℤ≥‘(𝑀 + 1))) → ((𝑛 ∈ ((𝑀 + 1)...𝑁) → (𝐹‘𝑀) < (𝐹‘𝑛)) → ((𝑛 + 1) ∈ ((𝑀 + 1)...𝑁) → (𝐹‘𝑀) < (𝐹‘𝑛)))) | 
| 42 |  | peano2uzr 12946 | . . . . . . . . . . . 12
⊢ ((𝑀 ∈ ℤ ∧ 𝑛 ∈
(ℤ≥‘(𝑀 + 1))) → 𝑛 ∈ (ℤ≥‘𝑀)) | 
| 43 | 42 | ex 412 | . . . . . . . . . . 11
⊢ (𝑀 ∈ ℤ → (𝑛 ∈
(ℤ≥‘(𝑀 + 1)) → 𝑛 ∈ (ℤ≥‘𝑀))) | 
| 44 | 43, 24 | syl11 33 | . . . . . . . . . 10
⊢ (𝑛 ∈
(ℤ≥‘(𝑀 + 1)) → (𝜑 → 𝑛 ∈ (ℤ≥‘𝑀))) | 
| 45 | 44 | adantr 480 | . . . . . . . . 9
⊢ ((𝑛 ∈
(ℤ≥‘(𝑀 + 1)) ∧ (𝑛 + 1) ∈ ((𝑀 + 1)...𝑁)) → (𝜑 → 𝑛 ∈ (ℤ≥‘𝑀))) | 
| 46 | 45 | impcom 407 | . . . . . . . 8
⊢ ((𝜑 ∧ (𝑛 ∈ (ℤ≥‘(𝑀 + 1)) ∧ (𝑛 + 1) ∈ ((𝑀 + 1)...𝑁))) → 𝑛 ∈ (ℤ≥‘𝑀)) | 
| 47 |  | eluzelz 12889 | . . . . . . . . . . 11
⊢ (𝑛 ∈
(ℤ≥‘(𝑀 + 1)) → 𝑛 ∈ ℤ) | 
| 48 | 47 | adantr 480 | . . . . . . . . . 10
⊢ ((𝑛 ∈
(ℤ≥‘(𝑀 + 1)) ∧ (𝑛 + 1) ∈ ((𝑀 + 1)...𝑁)) → 𝑛 ∈ ℤ) | 
| 49 | 48 | adantl 481 | . . . . . . . . 9
⊢ ((𝜑 ∧ (𝑛 ∈ (ℤ≥‘(𝑀 + 1)) ∧ (𝑛 + 1) ∈ ((𝑀 + 1)...𝑁))) → 𝑛 ∈ ℤ) | 
| 50 |  | elfzuz3 13562 | . . . . . . . . . 10
⊢ ((𝑛 + 1) ∈ ((𝑀 + 1)...𝑁) → 𝑁 ∈ (ℤ≥‘(𝑛 + 1))) | 
| 51 | 50 | ad2antll 729 | . . . . . . . . 9
⊢ ((𝜑 ∧ (𝑛 ∈ (ℤ≥‘(𝑀 + 1)) ∧ (𝑛 + 1) ∈ ((𝑀 + 1)...𝑁))) → 𝑁 ∈ (ℤ≥‘(𝑛 + 1))) | 
| 52 |  | eluzp1m1 12905 | . . . . . . . . 9
⊢ ((𝑛 ∈ ℤ ∧ 𝑁 ∈
(ℤ≥‘(𝑛 + 1))) → (𝑁 − 1) ∈
(ℤ≥‘𝑛)) | 
| 53 | 49, 51, 52 | syl2anc 584 | . . . . . . . 8
⊢ ((𝜑 ∧ (𝑛 ∈ (ℤ≥‘(𝑀 + 1)) ∧ (𝑛 + 1) ∈ ((𝑀 + 1)...𝑁))) → (𝑁 − 1) ∈
(ℤ≥‘𝑛)) | 
| 54 |  | elfzuzb 13559 | . . . . . . . 8
⊢ (𝑛 ∈ (𝑀...(𝑁 − 1)) ↔ (𝑛 ∈ (ℤ≥‘𝑀) ∧ (𝑁 − 1) ∈
(ℤ≥‘𝑛))) | 
| 55 | 46, 53, 54 | sylanbrc 583 | . . . . . . 7
⊢ ((𝜑 ∧ (𝑛 ∈ (ℤ≥‘(𝑀 + 1)) ∧ (𝑛 + 1) ∈ ((𝑀 + 1)...𝑁))) → 𝑛 ∈ (𝑀...(𝑁 − 1))) | 
| 56 | 30 | adantr 480 | . . . . . . 7
⊢ ((𝜑 ∧ (𝑛 ∈ (ℤ≥‘(𝑀 + 1)) ∧ (𝑛 + 1) ∈ ((𝑀 + 1)...𝑁))) → ∀𝑘 ∈ (𝑀...(𝑁 − 1))(𝐹‘𝑘) < (𝐹‘(𝑘 + 1))) | 
| 57 |  | fveq2 6905 | . . . . . . . . 9
⊢ (𝑘 = 𝑛 → (𝐹‘𝑘) = (𝐹‘𝑛)) | 
| 58 |  | fvoveq1 7455 | . . . . . . . . 9
⊢ (𝑘 = 𝑛 → (𝐹‘(𝑘 + 1)) = (𝐹‘(𝑛 + 1))) | 
| 59 | 57, 58 | breq12d 5155 | . . . . . . . 8
⊢ (𝑘 = 𝑛 → ((𝐹‘𝑘) < (𝐹‘(𝑘 + 1)) ↔ (𝐹‘𝑛) < (𝐹‘(𝑛 + 1)))) | 
| 60 | 59 | rspcv 3617 | . . . . . . 7
⊢ (𝑛 ∈ (𝑀...(𝑁 − 1)) → (∀𝑘 ∈ (𝑀...(𝑁 − 1))(𝐹‘𝑘) < (𝐹‘(𝑘 + 1)) → (𝐹‘𝑛) < (𝐹‘(𝑛 + 1)))) | 
| 61 | 55, 56, 60 | sylc 65 | . . . . . 6
⊢ ((𝜑 ∧ (𝑛 ∈ (ℤ≥‘(𝑀 + 1)) ∧ (𝑛 + 1) ∈ ((𝑀 + 1)...𝑁))) → (𝐹‘𝑛) < (𝐹‘(𝑛 + 1))) | 
| 62 |  | zre 12619 | . . . . . . . . . . . . 13
⊢ (𝑀 ∈ ℤ → 𝑀 ∈
ℝ) | 
| 63 | 62 | lep1d 12200 | . . . . . . . . . . . 12
⊢ (𝑀 ∈ ℤ → 𝑀 ≤ (𝑀 + 1)) | 
| 64 | 24, 63 | jccir 521 | . . . . . . . . . . 11
⊢ (𝜑 → (𝑀 ∈ ℤ ∧ 𝑀 ≤ (𝑀 + 1))) | 
| 65 |  | eluzuzle 12888 | . . . . . . . . . . 11
⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≤ (𝑀 + 1)) → (𝑁 ∈ (ℤ≥‘(𝑀 + 1)) → 𝑁 ∈ (ℤ≥‘𝑀))) | 
| 66 | 64, 1, 65 | sylc 65 | . . . . . . . . . 10
⊢ (𝜑 → 𝑁 ∈ (ℤ≥‘𝑀)) | 
| 67 |  | eluzfz1 13572 | . . . . . . . . . 10
⊢ (𝑁 ∈
(ℤ≥‘𝑀) → 𝑀 ∈ (𝑀...𝑁)) | 
| 68 | 66, 67 | syl 17 | . . . . . . . . 9
⊢ (𝜑 → 𝑀 ∈ (𝑀...𝑁)) | 
| 69 |  | smonoord.2 | . . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀...𝑁)) → (𝐹‘𝑘) ∈ ℝ) | 
| 70 | 69 | ralrimiva 3145 | . . . . . . . . 9
⊢ (𝜑 → ∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) ∈ ℝ) | 
| 71 | 31 | eleq1d 2825 | . . . . . . . . . 10
⊢ (𝑘 = 𝑀 → ((𝐹‘𝑘) ∈ ℝ ↔ (𝐹‘𝑀) ∈ ℝ)) | 
| 72 | 71 | rspcv 3617 | . . . . . . . . 9
⊢ (𝑀 ∈ (𝑀...𝑁) → (∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) ∈ ℝ → (𝐹‘𝑀) ∈ ℝ)) | 
| 73 | 68, 70, 72 | sylc 65 | . . . . . . . 8
⊢ (𝜑 → (𝐹‘𝑀) ∈ ℝ) | 
| 74 | 73 | adantr 480 | . . . . . . 7
⊢ ((𝜑 ∧ (𝑛 ∈ (ℤ≥‘(𝑀 + 1)) ∧ (𝑛 + 1) ∈ ((𝑀 + 1)...𝑁))) → (𝐹‘𝑀) ∈ ℝ) | 
| 75 |  | fzp1ss 13616 | . . . . . . . . . . . . . 14
⊢ (𝑀 ∈ ℤ → ((𝑀 + 1)...𝑁) ⊆ (𝑀...𝑁)) | 
| 76 | 24, 75 | syl 17 | . . . . . . . . . . . . 13
⊢ (𝜑 → ((𝑀 + 1)...𝑁) ⊆ (𝑀...𝑁)) | 
| 77 | 76 | sseld 3981 | . . . . . . . . . . . 12
⊢ (𝜑 → ((𝑛 + 1) ∈ ((𝑀 + 1)...𝑁) → (𝑛 + 1) ∈ (𝑀...𝑁))) | 
| 78 | 77 | com12 32 | . . . . . . . . . . 11
⊢ ((𝑛 + 1) ∈ ((𝑀 + 1)...𝑁) → (𝜑 → (𝑛 + 1) ∈ (𝑀...𝑁))) | 
| 79 | 78 | adantl 481 | . . . . . . . . . 10
⊢ ((𝑛 ∈
(ℤ≥‘(𝑀 + 1)) ∧ (𝑛 + 1) ∈ ((𝑀 + 1)...𝑁)) → (𝜑 → (𝑛 + 1) ∈ (𝑀...𝑁))) | 
| 80 | 79 | impcom 407 | . . . . . . . . 9
⊢ ((𝜑 ∧ (𝑛 ∈ (ℤ≥‘(𝑀 + 1)) ∧ (𝑛 + 1) ∈ ((𝑀 + 1)...𝑁))) → (𝑛 + 1) ∈ (𝑀...𝑁)) | 
| 81 |  | peano2fzr 13578 | . . . . . . . . 9
⊢ ((𝑛 ∈
(ℤ≥‘𝑀) ∧ (𝑛 + 1) ∈ (𝑀...𝑁)) → 𝑛 ∈ (𝑀...𝑁)) | 
| 82 | 46, 80, 81 | syl2anc 584 | . . . . . . . 8
⊢ ((𝜑 ∧ (𝑛 ∈ (ℤ≥‘(𝑀 + 1)) ∧ (𝑛 + 1) ∈ ((𝑀 + 1)...𝑁))) → 𝑛 ∈ (𝑀...𝑁)) | 
| 83 | 70 | adantr 480 | . . . . . . . 8
⊢ ((𝜑 ∧ (𝑛 ∈ (ℤ≥‘(𝑀 + 1)) ∧ (𝑛 + 1) ∈ ((𝑀 + 1)...𝑁))) → ∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) ∈ ℝ) | 
| 84 | 57 | eleq1d 2825 | . . . . . . . . 9
⊢ (𝑘 = 𝑛 → ((𝐹‘𝑘) ∈ ℝ ↔ (𝐹‘𝑛) ∈ ℝ)) | 
| 85 | 84 | rspcv 3617 | . . . . . . . 8
⊢ (𝑛 ∈ (𝑀...𝑁) → (∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) ∈ ℝ → (𝐹‘𝑛) ∈ ℝ)) | 
| 86 | 82, 83, 85 | sylc 65 | . . . . . . 7
⊢ ((𝜑 ∧ (𝑛 ∈ (ℤ≥‘(𝑀 + 1)) ∧ (𝑛 + 1) ∈ ((𝑀 + 1)...𝑁))) → (𝐹‘𝑛) ∈ ℝ) | 
| 87 |  | fveq2 6905 | . . . . . . . . . 10
⊢ (𝑘 = (𝑛 + 1) → (𝐹‘𝑘) = (𝐹‘(𝑛 + 1))) | 
| 88 | 87 | eleq1d 2825 | . . . . . . . . 9
⊢ (𝑘 = (𝑛 + 1) → ((𝐹‘𝑘) ∈ ℝ ↔ (𝐹‘(𝑛 + 1)) ∈ ℝ)) | 
| 89 | 88 | rspcv 3617 | . . . . . . . 8
⊢ ((𝑛 + 1) ∈ (𝑀...𝑁) → (∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) ∈ ℝ → (𝐹‘(𝑛 + 1)) ∈ ℝ)) | 
| 90 | 80, 83, 89 | sylc 65 | . . . . . . 7
⊢ ((𝜑 ∧ (𝑛 ∈ (ℤ≥‘(𝑀 + 1)) ∧ (𝑛 + 1) ∈ ((𝑀 + 1)...𝑁))) → (𝐹‘(𝑛 + 1)) ∈ ℝ) | 
| 91 |  | lttr 11338 | . . . . . . 7
⊢ (((𝐹‘𝑀) ∈ ℝ ∧ (𝐹‘𝑛) ∈ ℝ ∧ (𝐹‘(𝑛 + 1)) ∈ ℝ) → (((𝐹‘𝑀) < (𝐹‘𝑛) ∧ (𝐹‘𝑛) < (𝐹‘(𝑛 + 1))) → (𝐹‘𝑀) < (𝐹‘(𝑛 + 1)))) | 
| 92 | 74, 86, 90, 91 | syl3anc 1372 | . . . . . 6
⊢ ((𝜑 ∧ (𝑛 ∈ (ℤ≥‘(𝑀 + 1)) ∧ (𝑛 + 1) ∈ ((𝑀 + 1)...𝑁))) → (((𝐹‘𝑀) < (𝐹‘𝑛) ∧ (𝐹‘𝑛) < (𝐹‘(𝑛 + 1))) → (𝐹‘𝑀) < (𝐹‘(𝑛 + 1)))) | 
| 93 | 61, 92 | mpan2d 694 | . . . . 5
⊢ ((𝜑 ∧ (𝑛 ∈ (ℤ≥‘(𝑀 + 1)) ∧ (𝑛 + 1) ∈ ((𝑀 + 1)...𝑁))) → ((𝐹‘𝑀) < (𝐹‘𝑛) → (𝐹‘𝑀) < (𝐹‘(𝑛 + 1)))) | 
| 94 | 41, 93 | animpimp2impd 846 | . . . 4
⊢ (𝑛 ∈
(ℤ≥‘(𝑀 + 1)) → ((𝜑 → (𝑛 ∈ ((𝑀 + 1)...𝑁) → (𝐹‘𝑀) < (𝐹‘𝑛))) → (𝜑 → ((𝑛 + 1) ∈ ((𝑀 + 1)...𝑁) → (𝐹‘𝑀) < (𝐹‘(𝑛 + 1)))))) | 
| 95 | 8, 13, 18, 23, 37, 94 | uzind4 12949 | . . 3
⊢ (𝑁 ∈
(ℤ≥‘(𝑀 + 1)) → (𝜑 → (𝑁 ∈ ((𝑀 + 1)...𝑁) → (𝐹‘𝑀) < (𝐹‘𝑁)))) | 
| 96 | 1, 95 | mpcom 38 | . 2
⊢ (𝜑 → (𝑁 ∈ ((𝑀 + 1)...𝑁) → (𝐹‘𝑀) < (𝐹‘𝑁))) | 
| 97 | 3, 96 | mpd 15 | 1
⊢ (𝜑 → (𝐹‘𝑀) < (𝐹‘𝑁)) |