This is an inofficial mirror of http://metamath.tirix.org for personal testing of a visualizer extension only.
Description: Expand out the sum in dfitg . (Contributed by Mario Carneiro, 1-Aug-2014) (Revised by Mario Carneiro, 23-Aug-2014)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | itgcnlem.r | ⊢ 𝑅 = ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ 𝐵 ) ) , ( ℜ ‘ 𝐵 ) , 0 ) ) ) | |
| itgcnlem.s | ⊢ 𝑆 = ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ - ( ℜ ‘ 𝐵 ) ) , - ( ℜ ‘ 𝐵 ) , 0 ) ) ) | ||
| itgcnlem.t | ⊢ 𝑇 = ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℑ ‘ 𝐵 ) ) , ( ℑ ‘ 𝐵 ) , 0 ) ) ) | ||
| itgcnlem.u | ⊢ 𝑈 = ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ - ( ℑ ‘ 𝐵 ) ) , - ( ℑ ‘ 𝐵 ) , 0 ) ) ) | ||
| itgcnlem.v | ⊢ ( ( 𝜑 ∧ 𝑥 ∈ 𝐴 ) → 𝐵 ∈ 𝑉 ) | ||
| itgcnlem.i | ⊢ ( 𝜑 → ( 𝑥 ∈ 𝐴 ↦ 𝐵 ) ∈ 𝐿1 ) | ||
| Assertion | itgcnlem | ⊢ ( 𝜑 → ∫ 𝐴 𝐵 d 𝑥 = ( ( 𝑅 − 𝑆 ) + ( i · ( 𝑇 − 𝑈 ) ) ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | itgcnlem.r | ⊢ 𝑅 = ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ 𝐵 ) ) , ( ℜ ‘ 𝐵 ) , 0 ) ) ) | |
| 2 | itgcnlem.s | ⊢ 𝑆 = ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ - ( ℜ ‘ 𝐵 ) ) , - ( ℜ ‘ 𝐵 ) , 0 ) ) ) | |
| 3 | itgcnlem.t | ⊢ 𝑇 = ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℑ ‘ 𝐵 ) ) , ( ℑ ‘ 𝐵 ) , 0 ) ) ) | |
| 4 | itgcnlem.u | ⊢ 𝑈 = ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ - ( ℑ ‘ 𝐵 ) ) , - ( ℑ ‘ 𝐵 ) , 0 ) ) ) | |
| 5 | itgcnlem.v | ⊢ ( ( 𝜑 ∧ 𝑥 ∈ 𝐴 ) → 𝐵 ∈ 𝑉 ) | |
| 6 | itgcnlem.i | ⊢ ( 𝜑 → ( 𝑥 ∈ 𝐴 ↦ 𝐵 ) ∈ 𝐿1 ) | |
| 7 | eqid | ⊢ ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) = ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) | |
| 8 | 7 | dfitg | ⊢ ∫ 𝐴 𝐵 d 𝑥 = Σ 𝑘 ∈ ( 0 ... 3 ) ( ( i ↑ 𝑘 ) · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) ) , ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) , 0 ) ) ) ) |
| 9 | nn0uz | ⊢ ℕ0 = ( ℤ≥ ‘ 0 ) | |
| 10 | df-3 | ⊢ 3 = ( 2 + 1 ) | |
| 11 | oveq2 | ⊢ ( 𝑘 = 3 → ( i ↑ 𝑘 ) = ( i ↑ 3 ) ) | |
| 12 | i3 | ⊢ ( i ↑ 3 ) = - i | |
| 13 | 11 12 | eqtrdi | ⊢ ( 𝑘 = 3 → ( i ↑ 𝑘 ) = - i ) |
| 14 | 12 | itgvallem | ⊢ ( 𝑘 = 3 → ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) ) , ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) , 0 ) ) ) = ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / - i ) ) ) , ( ℜ ‘ ( 𝐵 / - i ) ) , 0 ) ) ) ) |
| 15 | 13 14 | oveq12d | ⊢ ( 𝑘 = 3 → ( ( i ↑ 𝑘 ) · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) ) , ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) , 0 ) ) ) ) = ( - i · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / - i ) ) ) , ( ℜ ‘ ( 𝐵 / - i ) ) , 0 ) ) ) ) ) |
| 16 | ax-icn | ⊢ i ∈ ℂ | |
| 17 | 16 | a1i | ⊢ ( 𝜑 → i ∈ ℂ ) |
| 18 | expcl | ⊢ ( ( i ∈ ℂ ∧ 𝑘 ∈ ℕ0 ) → ( i ↑ 𝑘 ) ∈ ℂ ) | |
| 19 | 17 18 | sylan | ⊢ ( ( 𝜑 ∧ 𝑘 ∈ ℕ0 ) → ( i ↑ 𝑘 ) ∈ ℂ ) |
| 20 | nn0z | ⊢ ( 𝑘 ∈ ℕ0 → 𝑘 ∈ ℤ ) | |
| 21 | eqidd | ⊢ ( 𝜑 → ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) ) , ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) , 0 ) ) = ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) ) , ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) , 0 ) ) ) | |
| 22 | eqidd | ⊢ ( ( 𝜑 ∧ 𝑥 ∈ 𝐴 ) → ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) = ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) ) | |
| 23 | 21 22 6 5 | iblitg | ⊢ ( ( 𝜑 ∧ 𝑘 ∈ ℤ ) → ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) ) , ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) , 0 ) ) ) ∈ ℝ ) |
| 24 | 23 | recnd | ⊢ ( ( 𝜑 ∧ 𝑘 ∈ ℤ ) → ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) ) , ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) , 0 ) ) ) ∈ ℂ ) |
| 25 | 20 24 | sylan2 | ⊢ ( ( 𝜑 ∧ 𝑘 ∈ ℕ0 ) → ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) ) , ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) , 0 ) ) ) ∈ ℂ ) |
| 26 | 19 25 | mulcld | ⊢ ( ( 𝜑 ∧ 𝑘 ∈ ℕ0 ) → ( ( i ↑ 𝑘 ) · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) ) , ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) , 0 ) ) ) ) ∈ ℂ ) |
| 27 | df-2 | ⊢ 2 = ( 1 + 1 ) | |
| 28 | oveq2 | ⊢ ( 𝑘 = 2 → ( i ↑ 𝑘 ) = ( i ↑ 2 ) ) | |
| 29 | i2 | ⊢ ( i ↑ 2 ) = - 1 | |
| 30 | 28 29 | eqtrdi | ⊢ ( 𝑘 = 2 → ( i ↑ 𝑘 ) = - 1 ) |
| 31 | 29 | itgvallem | ⊢ ( 𝑘 = 2 → ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) ) , ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) , 0 ) ) ) = ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / - 1 ) ) ) , ( ℜ ‘ ( 𝐵 / - 1 ) ) , 0 ) ) ) ) |
| 32 | 30 31 | oveq12d | ⊢ ( 𝑘 = 2 → ( ( i ↑ 𝑘 ) · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) ) , ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) , 0 ) ) ) ) = ( - 1 · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / - 1 ) ) ) , ( ℜ ‘ ( 𝐵 / - 1 ) ) , 0 ) ) ) ) ) |
| 33 | 1e0p1 | ⊢ 1 = ( 0 + 1 ) | |
| 34 | oveq2 | ⊢ ( 𝑘 = 1 → ( i ↑ 𝑘 ) = ( i ↑ 1 ) ) | |
| 35 | exp1 | ⊢ ( i ∈ ℂ → ( i ↑ 1 ) = i ) | |
| 36 | 16 35 | ax-mp | ⊢ ( i ↑ 1 ) = i |
| 37 | 34 36 | eqtrdi | ⊢ ( 𝑘 = 1 → ( i ↑ 𝑘 ) = i ) |
| 38 | 36 | itgvallem | ⊢ ( 𝑘 = 1 → ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) ) , ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) , 0 ) ) ) = ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / i ) ) ) , ( ℜ ‘ ( 𝐵 / i ) ) , 0 ) ) ) ) |
| 39 | 37 38 | oveq12d | ⊢ ( 𝑘 = 1 → ( ( i ↑ 𝑘 ) · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) ) , ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) , 0 ) ) ) ) = ( i · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / i ) ) ) , ( ℜ ‘ ( 𝐵 / i ) ) , 0 ) ) ) ) ) |
| 40 | 0z | ⊢ 0 ∈ ℤ | |
| 41 | iblmbf | ⊢ ( ( 𝑥 ∈ 𝐴 ↦ 𝐵 ) ∈ 𝐿1 → ( 𝑥 ∈ 𝐴 ↦ 𝐵 ) ∈ MblFn ) | |
| 42 | 6 41 | syl | ⊢ ( 𝜑 → ( 𝑥 ∈ 𝐴 ↦ 𝐵 ) ∈ MblFn ) |
| 43 | 42 5 | mbfmptcl | ⊢ ( ( 𝜑 ∧ 𝑥 ∈ 𝐴 ) → 𝐵 ∈ ℂ ) |
| 44 | 43 | div1d | ⊢ ( ( 𝜑 ∧ 𝑥 ∈ 𝐴 ) → ( 𝐵 / 1 ) = 𝐵 ) |
| 45 | 44 | fveq2d | ⊢ ( ( 𝜑 ∧ 𝑥 ∈ 𝐴 ) → ( ℜ ‘ ( 𝐵 / 1 ) ) = ( ℜ ‘ 𝐵 ) ) |
| 46 | 45 | ibllem | ⊢ ( 𝜑 → if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / 1 ) ) ) , ( ℜ ‘ ( 𝐵 / 1 ) ) , 0 ) = if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ 𝐵 ) ) , ( ℜ ‘ 𝐵 ) , 0 ) ) |
| 47 | 46 | mpteq2dv | ⊢ ( 𝜑 → ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / 1 ) ) ) , ( ℜ ‘ ( 𝐵 / 1 ) ) , 0 ) ) = ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ 𝐵 ) ) , ( ℜ ‘ 𝐵 ) , 0 ) ) ) |
| 48 | 47 | fveq2d | ⊢ ( 𝜑 → ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / 1 ) ) ) , ( ℜ ‘ ( 𝐵 / 1 ) ) , 0 ) ) ) = ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ 𝐵 ) ) , ( ℜ ‘ 𝐵 ) , 0 ) ) ) ) |
| 49 | 1 48 | eqtr4id | ⊢ ( 𝜑 → 𝑅 = ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / 1 ) ) ) , ( ℜ ‘ ( 𝐵 / 1 ) ) , 0 ) ) ) ) |
| 50 | 49 | oveq2d | ⊢ ( 𝜑 → ( 1 · 𝑅 ) = ( 1 · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / 1 ) ) ) , ( ℜ ‘ ( 𝐵 / 1 ) ) , 0 ) ) ) ) ) |
| 51 | 1 2 3 4 5 | iblcnlem | ⊢ ( 𝜑 → ( ( 𝑥 ∈ 𝐴 ↦ 𝐵 ) ∈ 𝐿1 ↔ ( ( 𝑥 ∈ 𝐴 ↦ 𝐵 ) ∈ MblFn ∧ ( 𝑅 ∈ ℝ ∧ 𝑆 ∈ ℝ ) ∧ ( 𝑇 ∈ ℝ ∧ 𝑈 ∈ ℝ ) ) ) ) |
| 52 | 6 51 | mpbid | ⊢ ( 𝜑 → ( ( 𝑥 ∈ 𝐴 ↦ 𝐵 ) ∈ MblFn ∧ ( 𝑅 ∈ ℝ ∧ 𝑆 ∈ ℝ ) ∧ ( 𝑇 ∈ ℝ ∧ 𝑈 ∈ ℝ ) ) ) |
| 53 | 52 | simp2d | ⊢ ( 𝜑 → ( 𝑅 ∈ ℝ ∧ 𝑆 ∈ ℝ ) ) |
| 54 | 53 | simpld | ⊢ ( 𝜑 → 𝑅 ∈ ℝ ) |
| 55 | 54 | recnd | ⊢ ( 𝜑 → 𝑅 ∈ ℂ ) |
| 56 | 55 | mullidd | ⊢ ( 𝜑 → ( 1 · 𝑅 ) = 𝑅 ) |
| 57 | 50 56 | eqtr3d | ⊢ ( 𝜑 → ( 1 · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / 1 ) ) ) , ( ℜ ‘ ( 𝐵 / 1 ) ) , 0 ) ) ) ) = 𝑅 ) |
| 58 | 57 55 | eqeltrd | ⊢ ( 𝜑 → ( 1 · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / 1 ) ) ) , ( ℜ ‘ ( 𝐵 / 1 ) ) , 0 ) ) ) ) ∈ ℂ ) |
| 59 | oveq2 | ⊢ ( 𝑘 = 0 → ( i ↑ 𝑘 ) = ( i ↑ 0 ) ) | |
| 60 | exp0 | ⊢ ( i ∈ ℂ → ( i ↑ 0 ) = 1 ) | |
| 61 | 16 60 | ax-mp | ⊢ ( i ↑ 0 ) = 1 |
| 62 | 59 61 | eqtrdi | ⊢ ( 𝑘 = 0 → ( i ↑ 𝑘 ) = 1 ) |
| 63 | 61 | itgvallem | ⊢ ( 𝑘 = 0 → ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) ) , ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) , 0 ) ) ) = ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / 1 ) ) ) , ( ℜ ‘ ( 𝐵 / 1 ) ) , 0 ) ) ) ) |
| 64 | 62 63 | oveq12d | ⊢ ( 𝑘 = 0 → ( ( i ↑ 𝑘 ) · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) ) , ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) , 0 ) ) ) ) = ( 1 · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / 1 ) ) ) , ( ℜ ‘ ( 𝐵 / 1 ) ) , 0 ) ) ) ) ) |
| 65 | 64 | fsum1 | ⊢ ( ( 0 ∈ ℤ ∧ ( 1 · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / 1 ) ) ) , ( ℜ ‘ ( 𝐵 / 1 ) ) , 0 ) ) ) ) ∈ ℂ ) → Σ 𝑘 ∈ ( 0 ... 0 ) ( ( i ↑ 𝑘 ) · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) ) , ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) , 0 ) ) ) ) = ( 1 · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / 1 ) ) ) , ( ℜ ‘ ( 𝐵 / 1 ) ) , 0 ) ) ) ) ) |
| 66 | 40 58 65 | sylancr | ⊢ ( 𝜑 → Σ 𝑘 ∈ ( 0 ... 0 ) ( ( i ↑ 𝑘 ) · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) ) , ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) , 0 ) ) ) ) = ( 1 · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / 1 ) ) ) , ( ℜ ‘ ( 𝐵 / 1 ) ) , 0 ) ) ) ) ) |
| 67 | 66 57 | eqtrd | ⊢ ( 𝜑 → Σ 𝑘 ∈ ( 0 ... 0 ) ( ( i ↑ 𝑘 ) · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) ) , ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) , 0 ) ) ) ) = 𝑅 ) |
| 68 | 0nn0 | ⊢ 0 ∈ ℕ0 | |
| 69 | 67 68 | jctil | ⊢ ( 𝜑 → ( 0 ∈ ℕ0 ∧ Σ 𝑘 ∈ ( 0 ... 0 ) ( ( i ↑ 𝑘 ) · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) ) , ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) , 0 ) ) ) ) = 𝑅 ) ) |
| 70 | imval | ⊢ ( 𝐵 ∈ ℂ → ( ℑ ‘ 𝐵 ) = ( ℜ ‘ ( 𝐵 / i ) ) ) | |
| 71 | 43 70 | syl | ⊢ ( ( 𝜑 ∧ 𝑥 ∈ 𝐴 ) → ( ℑ ‘ 𝐵 ) = ( ℜ ‘ ( 𝐵 / i ) ) ) |
| 72 | 71 | ibllem | ⊢ ( 𝜑 → if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℑ ‘ 𝐵 ) ) , ( ℑ ‘ 𝐵 ) , 0 ) = if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / i ) ) ) , ( ℜ ‘ ( 𝐵 / i ) ) , 0 ) ) |
| 73 | 72 | mpteq2dv | ⊢ ( 𝜑 → ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℑ ‘ 𝐵 ) ) , ( ℑ ‘ 𝐵 ) , 0 ) ) = ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / i ) ) ) , ( ℜ ‘ ( 𝐵 / i ) ) , 0 ) ) ) |
| 74 | 73 | fveq2d | ⊢ ( 𝜑 → ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℑ ‘ 𝐵 ) ) , ( ℑ ‘ 𝐵 ) , 0 ) ) ) = ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / i ) ) ) , ( ℜ ‘ ( 𝐵 / i ) ) , 0 ) ) ) ) |
| 75 | 3 74 | eqtr2id | ⊢ ( 𝜑 → ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / i ) ) ) , ( ℜ ‘ ( 𝐵 / i ) ) , 0 ) ) ) = 𝑇 ) |
| 76 | 75 | oveq2d | ⊢ ( 𝜑 → ( i · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / i ) ) ) , ( ℜ ‘ ( 𝐵 / i ) ) , 0 ) ) ) ) = ( i · 𝑇 ) ) |
| 77 | 76 | oveq2d | ⊢ ( 𝜑 → ( 𝑅 + ( i · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / i ) ) ) , ( ℜ ‘ ( 𝐵 / i ) ) , 0 ) ) ) ) ) = ( 𝑅 + ( i · 𝑇 ) ) ) |
| 78 | 9 33 39 26 69 77 | fsump1i | ⊢ ( 𝜑 → ( 1 ∈ ℕ0 ∧ Σ 𝑘 ∈ ( 0 ... 1 ) ( ( i ↑ 𝑘 ) · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) ) , ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) , 0 ) ) ) ) = ( 𝑅 + ( i · 𝑇 ) ) ) ) |
| 79 | 43 | renegd | ⊢ ( ( 𝜑 ∧ 𝑥 ∈ 𝐴 ) → ( ℜ ‘ - 𝐵 ) = - ( ℜ ‘ 𝐵 ) ) |
| 80 | ax-1cn | ⊢ 1 ∈ ℂ | |
| 81 | 80 | negnegi | ⊢ - - 1 = 1 |
| 82 | 81 | oveq2i | ⊢ ( - 𝐵 / - - 1 ) = ( - 𝐵 / 1 ) |
| 83 | 43 | negcld | ⊢ ( ( 𝜑 ∧ 𝑥 ∈ 𝐴 ) → - 𝐵 ∈ ℂ ) |
| 84 | 83 | div1d | ⊢ ( ( 𝜑 ∧ 𝑥 ∈ 𝐴 ) → ( - 𝐵 / 1 ) = - 𝐵 ) |
| 85 | 82 84 | eqtrid | ⊢ ( ( 𝜑 ∧ 𝑥 ∈ 𝐴 ) → ( - 𝐵 / - - 1 ) = - 𝐵 ) |
| 86 | 80 | negcli | ⊢ - 1 ∈ ℂ |
| 87 | neg1ne0 | ⊢ - 1 ≠ 0 | |
| 88 | div2neg | ⊢ ( ( 𝐵 ∈ ℂ ∧ - 1 ∈ ℂ ∧ - 1 ≠ 0 ) → ( - 𝐵 / - - 1 ) = ( 𝐵 / - 1 ) ) | |
| 89 | 86 87 88 | mp3an23 | ⊢ ( 𝐵 ∈ ℂ → ( - 𝐵 / - - 1 ) = ( 𝐵 / - 1 ) ) |
| 90 | 43 89 | syl | ⊢ ( ( 𝜑 ∧ 𝑥 ∈ 𝐴 ) → ( - 𝐵 / - - 1 ) = ( 𝐵 / - 1 ) ) |
| 91 | 85 90 | eqtr3d | ⊢ ( ( 𝜑 ∧ 𝑥 ∈ 𝐴 ) → - 𝐵 = ( 𝐵 / - 1 ) ) |
| 92 | 91 | fveq2d | ⊢ ( ( 𝜑 ∧ 𝑥 ∈ 𝐴 ) → ( ℜ ‘ - 𝐵 ) = ( ℜ ‘ ( 𝐵 / - 1 ) ) ) |
| 93 | 79 92 | eqtr3d | ⊢ ( ( 𝜑 ∧ 𝑥 ∈ 𝐴 ) → - ( ℜ ‘ 𝐵 ) = ( ℜ ‘ ( 𝐵 / - 1 ) ) ) |
| 94 | 93 | ibllem | ⊢ ( 𝜑 → if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ - ( ℜ ‘ 𝐵 ) ) , - ( ℜ ‘ 𝐵 ) , 0 ) = if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / - 1 ) ) ) , ( ℜ ‘ ( 𝐵 / - 1 ) ) , 0 ) ) |
| 95 | 94 | mpteq2dv | ⊢ ( 𝜑 → ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ - ( ℜ ‘ 𝐵 ) ) , - ( ℜ ‘ 𝐵 ) , 0 ) ) = ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / - 1 ) ) ) , ( ℜ ‘ ( 𝐵 / - 1 ) ) , 0 ) ) ) |
| 96 | 95 | fveq2d | ⊢ ( 𝜑 → ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ - ( ℜ ‘ 𝐵 ) ) , - ( ℜ ‘ 𝐵 ) , 0 ) ) ) = ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / - 1 ) ) ) , ( ℜ ‘ ( 𝐵 / - 1 ) ) , 0 ) ) ) ) |
| 97 | 2 96 | eqtrid | ⊢ ( 𝜑 → 𝑆 = ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / - 1 ) ) ) , ( ℜ ‘ ( 𝐵 / - 1 ) ) , 0 ) ) ) ) |
| 98 | 97 | oveq2d | ⊢ ( 𝜑 → ( - 1 · 𝑆 ) = ( - 1 · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / - 1 ) ) ) , ( ℜ ‘ ( 𝐵 / - 1 ) ) , 0 ) ) ) ) ) |
| 99 | 53 | simprd | ⊢ ( 𝜑 → 𝑆 ∈ ℝ ) |
| 100 | 99 | recnd | ⊢ ( 𝜑 → 𝑆 ∈ ℂ ) |
| 101 | 100 | mulm1d | ⊢ ( 𝜑 → ( - 1 · 𝑆 ) = - 𝑆 ) |
| 102 | 98 101 | eqtr3d | ⊢ ( 𝜑 → ( - 1 · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / - 1 ) ) ) , ( ℜ ‘ ( 𝐵 / - 1 ) ) , 0 ) ) ) ) = - 𝑆 ) |
| 103 | 102 | oveq2d | ⊢ ( 𝜑 → ( ( 𝑅 + ( i · 𝑇 ) ) + ( - 1 · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / - 1 ) ) ) , ( ℜ ‘ ( 𝐵 / - 1 ) ) , 0 ) ) ) ) ) = ( ( 𝑅 + ( i · 𝑇 ) ) + - 𝑆 ) ) |
| 104 | 52 | simp3d | ⊢ ( 𝜑 → ( 𝑇 ∈ ℝ ∧ 𝑈 ∈ ℝ ) ) |
| 105 | 104 | simpld | ⊢ ( 𝜑 → 𝑇 ∈ ℝ ) |
| 106 | 105 | recnd | ⊢ ( 𝜑 → 𝑇 ∈ ℂ ) |
| 107 | mulcl | ⊢ ( ( i ∈ ℂ ∧ 𝑇 ∈ ℂ ) → ( i · 𝑇 ) ∈ ℂ ) | |
| 108 | 16 106 107 | sylancr | ⊢ ( 𝜑 → ( i · 𝑇 ) ∈ ℂ ) |
| 109 | 55 108 | addcld | ⊢ ( 𝜑 → ( 𝑅 + ( i · 𝑇 ) ) ∈ ℂ ) |
| 110 | 109 100 | negsubd | ⊢ ( 𝜑 → ( ( 𝑅 + ( i · 𝑇 ) ) + - 𝑆 ) = ( ( 𝑅 + ( i · 𝑇 ) ) − 𝑆 ) ) |
| 111 | 55 108 100 | addsubd | ⊢ ( 𝜑 → ( ( 𝑅 + ( i · 𝑇 ) ) − 𝑆 ) = ( ( 𝑅 − 𝑆 ) + ( i · 𝑇 ) ) ) |
| 112 | 103 110 111 | 3eqtrd | ⊢ ( 𝜑 → ( ( 𝑅 + ( i · 𝑇 ) ) + ( - 1 · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / - 1 ) ) ) , ( ℜ ‘ ( 𝐵 / - 1 ) ) , 0 ) ) ) ) ) = ( ( 𝑅 − 𝑆 ) + ( i · 𝑇 ) ) ) |
| 113 | 9 27 32 26 78 112 | fsump1i | ⊢ ( 𝜑 → ( 2 ∈ ℕ0 ∧ Σ 𝑘 ∈ ( 0 ... 2 ) ( ( i ↑ 𝑘 ) · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) ) , ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) , 0 ) ) ) ) = ( ( 𝑅 − 𝑆 ) + ( i · 𝑇 ) ) ) ) |
| 114 | imval | ⊢ ( - 𝐵 ∈ ℂ → ( ℑ ‘ - 𝐵 ) = ( ℜ ‘ ( - 𝐵 / i ) ) ) | |
| 115 | 83 114 | syl | ⊢ ( ( 𝜑 ∧ 𝑥 ∈ 𝐴 ) → ( ℑ ‘ - 𝐵 ) = ( ℜ ‘ ( - 𝐵 / i ) ) ) |
| 116 | 43 | imnegd | ⊢ ( ( 𝜑 ∧ 𝑥 ∈ 𝐴 ) → ( ℑ ‘ - 𝐵 ) = - ( ℑ ‘ 𝐵 ) ) |
| 117 | 16 | negnegi | ⊢ - - i = i |
| 118 | 117 | eqcomi | ⊢ i = - - i |
| 119 | 118 | oveq2i | ⊢ ( - 𝐵 / i ) = ( - 𝐵 / - - i ) |
| 120 | 16 | negcli | ⊢ - i ∈ ℂ |
| 121 | ine0 | ⊢ i ≠ 0 | |
| 122 | 16 121 | negne0i | ⊢ - i ≠ 0 |
| 123 | div2neg | ⊢ ( ( 𝐵 ∈ ℂ ∧ - i ∈ ℂ ∧ - i ≠ 0 ) → ( - 𝐵 / - - i ) = ( 𝐵 / - i ) ) | |
| 124 | 120 122 123 | mp3an23 | ⊢ ( 𝐵 ∈ ℂ → ( - 𝐵 / - - i ) = ( 𝐵 / - i ) ) |
| 125 | 43 124 | syl | ⊢ ( ( 𝜑 ∧ 𝑥 ∈ 𝐴 ) → ( - 𝐵 / - - i ) = ( 𝐵 / - i ) ) |
| 126 | 119 125 | eqtrid | ⊢ ( ( 𝜑 ∧ 𝑥 ∈ 𝐴 ) → ( - 𝐵 / i ) = ( 𝐵 / - i ) ) |
| 127 | 126 | fveq2d | ⊢ ( ( 𝜑 ∧ 𝑥 ∈ 𝐴 ) → ( ℜ ‘ ( - 𝐵 / i ) ) = ( ℜ ‘ ( 𝐵 / - i ) ) ) |
| 128 | 115 116 127 | 3eqtr3d | ⊢ ( ( 𝜑 ∧ 𝑥 ∈ 𝐴 ) → - ( ℑ ‘ 𝐵 ) = ( ℜ ‘ ( 𝐵 / - i ) ) ) |
| 129 | 128 | ibllem | ⊢ ( 𝜑 → if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ - ( ℑ ‘ 𝐵 ) ) , - ( ℑ ‘ 𝐵 ) , 0 ) = if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / - i ) ) ) , ( ℜ ‘ ( 𝐵 / - i ) ) , 0 ) ) |
| 130 | 129 | mpteq2dv | ⊢ ( 𝜑 → ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ - ( ℑ ‘ 𝐵 ) ) , - ( ℑ ‘ 𝐵 ) , 0 ) ) = ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / - i ) ) ) , ( ℜ ‘ ( 𝐵 / - i ) ) , 0 ) ) ) |
| 131 | 130 | fveq2d | ⊢ ( 𝜑 → ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ - ( ℑ ‘ 𝐵 ) ) , - ( ℑ ‘ 𝐵 ) , 0 ) ) ) = ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / - i ) ) ) , ( ℜ ‘ ( 𝐵 / - i ) ) , 0 ) ) ) ) |
| 132 | 4 131 | eqtrid | ⊢ ( 𝜑 → 𝑈 = ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / - i ) ) ) , ( ℜ ‘ ( 𝐵 / - i ) ) , 0 ) ) ) ) |
| 133 | 132 | oveq2d | ⊢ ( 𝜑 → ( - i · 𝑈 ) = ( - i · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / - i ) ) ) , ( ℜ ‘ ( 𝐵 / - i ) ) , 0 ) ) ) ) ) |
| 134 | 104 | simprd | ⊢ ( 𝜑 → 𝑈 ∈ ℝ ) |
| 135 | 134 | recnd | ⊢ ( 𝜑 → 𝑈 ∈ ℂ ) |
| 136 | mulneg12 | ⊢ ( ( i ∈ ℂ ∧ 𝑈 ∈ ℂ ) → ( - i · 𝑈 ) = ( i · - 𝑈 ) ) | |
| 137 | 16 135 136 | sylancr | ⊢ ( 𝜑 → ( - i · 𝑈 ) = ( i · - 𝑈 ) ) |
| 138 | 133 137 | eqtr3d | ⊢ ( 𝜑 → ( - i · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / - i ) ) ) , ( ℜ ‘ ( 𝐵 / - i ) ) , 0 ) ) ) ) = ( i · - 𝑈 ) ) |
| 139 | 138 | oveq2d | ⊢ ( 𝜑 → ( ( ( 𝑅 − 𝑆 ) + ( i · 𝑇 ) ) + ( - i · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / - i ) ) ) , ( ℜ ‘ ( 𝐵 / - i ) ) , 0 ) ) ) ) ) = ( ( ( 𝑅 − 𝑆 ) + ( i · 𝑇 ) ) + ( i · - 𝑈 ) ) ) |
| 140 | 9 10 15 26 113 139 | fsump1i | ⊢ ( 𝜑 → ( 3 ∈ ℕ0 ∧ Σ 𝑘 ∈ ( 0 ... 3 ) ( ( i ↑ 𝑘 ) · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) ) , ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) , 0 ) ) ) ) = ( ( ( 𝑅 − 𝑆 ) + ( i · 𝑇 ) ) + ( i · - 𝑈 ) ) ) ) |
| 141 | 140 | simprd | ⊢ ( 𝜑 → Σ 𝑘 ∈ ( 0 ... 3 ) ( ( i ↑ 𝑘 ) · ( ∫2 ‘ ( 𝑥 ∈ ℝ ↦ if ( ( 𝑥 ∈ 𝐴 ∧ 0 ≤ ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) ) , ( ℜ ‘ ( 𝐵 / ( i ↑ 𝑘 ) ) ) , 0 ) ) ) ) = ( ( ( 𝑅 − 𝑆 ) + ( i · 𝑇 ) ) + ( i · - 𝑈 ) ) ) |
| 142 | 8 141 | eqtrid | ⊢ ( 𝜑 → ∫ 𝐴 𝐵 d 𝑥 = ( ( ( 𝑅 − 𝑆 ) + ( i · 𝑇 ) ) + ( i · - 𝑈 ) ) ) |
| 143 | 55 100 | subcld | ⊢ ( 𝜑 → ( 𝑅 − 𝑆 ) ∈ ℂ ) |
| 144 | 135 | negcld | ⊢ ( 𝜑 → - 𝑈 ∈ ℂ ) |
| 145 | mulcl | ⊢ ( ( i ∈ ℂ ∧ - 𝑈 ∈ ℂ ) → ( i · - 𝑈 ) ∈ ℂ ) | |
| 146 | 16 144 145 | sylancr | ⊢ ( 𝜑 → ( i · - 𝑈 ) ∈ ℂ ) |
| 147 | 143 108 146 | addassd | ⊢ ( 𝜑 → ( ( ( 𝑅 − 𝑆 ) + ( i · 𝑇 ) ) + ( i · - 𝑈 ) ) = ( ( 𝑅 − 𝑆 ) + ( ( i · 𝑇 ) + ( i · - 𝑈 ) ) ) ) |
| 148 | 17 106 144 | adddid | ⊢ ( 𝜑 → ( i · ( 𝑇 + - 𝑈 ) ) = ( ( i · 𝑇 ) + ( i · - 𝑈 ) ) ) |
| 149 | 106 135 | negsubd | ⊢ ( 𝜑 → ( 𝑇 + - 𝑈 ) = ( 𝑇 − 𝑈 ) ) |
| 150 | 149 | oveq2d | ⊢ ( 𝜑 → ( i · ( 𝑇 + - 𝑈 ) ) = ( i · ( 𝑇 − 𝑈 ) ) ) |
| 151 | 148 150 | eqtr3d | ⊢ ( 𝜑 → ( ( i · 𝑇 ) + ( i · - 𝑈 ) ) = ( i · ( 𝑇 − 𝑈 ) ) ) |
| 152 | 151 | oveq2d | ⊢ ( 𝜑 → ( ( 𝑅 − 𝑆 ) + ( ( i · 𝑇 ) + ( i · - 𝑈 ) ) ) = ( ( 𝑅 − 𝑆 ) + ( i · ( 𝑇 − 𝑈 ) ) ) ) |
| 153 | 142 147 152 | 3eqtrd | ⊢ ( 𝜑 → ∫ 𝐴 𝐵 d 𝑥 = ( ( 𝑅 − 𝑆 ) + ( i · ( 𝑇 − 𝑈 ) ) ) ) |