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| Mirrors > Home > MPE Home > Th. List > aaliou3lem1 | Structured version Visualization version GIF version | ||
| Description: Lemma for aaliou3 26313. (Contributed by Stefan O'Rear, 16-Nov-2014.) |
| Ref | Expression |
|---|---|
| aaliou3lem.a | ⊢ 𝐺 = (𝑐 ∈ (ℤ≥‘𝐴) ↦ ((2↑-(!‘𝐴)) · ((1 / 2)↑(𝑐 − 𝐴)))) |
| Ref | Expression |
|---|---|
| aaliou3lem1 | ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → (𝐺‘𝐵) ∈ ℝ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | oveq1 7363 | . . . . . 6 ⊢ (𝑐 = 𝐵 → (𝑐 − 𝐴) = (𝐵 − 𝐴)) | |
| 2 | 1 | oveq2d 7372 | . . . . 5 ⊢ (𝑐 = 𝐵 → ((1 / 2)↑(𝑐 − 𝐴)) = ((1 / 2)↑(𝐵 − 𝐴))) |
| 3 | 2 | oveq2d 7372 | . . . 4 ⊢ (𝑐 = 𝐵 → ((2↑-(!‘𝐴)) · ((1 / 2)↑(𝑐 − 𝐴))) = ((2↑-(!‘𝐴)) · ((1 / 2)↑(𝐵 − 𝐴)))) |
| 4 | aaliou3lem.a | . . . 4 ⊢ 𝐺 = (𝑐 ∈ (ℤ≥‘𝐴) ↦ ((2↑-(!‘𝐴)) · ((1 / 2)↑(𝑐 − 𝐴)))) | |
| 5 | ovex 7389 | . . . 4 ⊢ ((2↑-(!‘𝐴)) · ((1 / 2)↑(𝐵 − 𝐴))) ∈ V | |
| 6 | 3, 4, 5 | fvmpt 6939 | . . 3 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (𝐺‘𝐵) = ((2↑-(!‘𝐴)) · ((1 / 2)↑(𝐵 − 𝐴)))) |
| 7 | 6 | adantl 481 | . 2 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → (𝐺‘𝐵) = ((2↑-(!‘𝐴)) · ((1 / 2)↑(𝐵 − 𝐴)))) |
| 8 | 2rp 12908 | . . . . 5 ⊢ 2 ∈ ℝ+ | |
| 9 | simpl 482 | . . . . . . . . 9 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → 𝐴 ∈ ℕ) | |
| 10 | 9 | nnnn0d 12460 | . . . . . . . 8 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → 𝐴 ∈ ℕ0) |
| 11 | 10 | faccld 14205 | . . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → (!‘𝐴) ∈ ℕ) |
| 12 | 11 | nnzd 12512 | . . . . . 6 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → (!‘𝐴) ∈ ℤ) |
| 13 | 12 | znegcld 12596 | . . . . 5 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → -(!‘𝐴) ∈ ℤ) |
| 14 | rpexpcl 14001 | . . . . 5 ⊢ ((2 ∈ ℝ+ ∧ -(!‘𝐴) ∈ ℤ) → (2↑-(!‘𝐴)) ∈ ℝ+) | |
| 15 | 8, 13, 14 | sylancr 587 | . . . 4 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → (2↑-(!‘𝐴)) ∈ ℝ+) |
| 16 | halfre 12352 | . . . . . 6 ⊢ (1 / 2) ∈ ℝ | |
| 17 | halfgt0 12354 | . . . . . 6 ⊢ 0 < (1 / 2) | |
| 18 | 16, 17 | elrpii 12906 | . . . . 5 ⊢ (1 / 2) ∈ ℝ+ |
| 19 | eluzelz 12759 | . . . . . 6 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 𝐵 ∈ ℤ) | |
| 20 | nnz 12507 | . . . . . 6 ⊢ (𝐴 ∈ ℕ → 𝐴 ∈ ℤ) | |
| 21 | zsubcl 12531 | . . . . . 6 ⊢ ((𝐵 ∈ ℤ ∧ 𝐴 ∈ ℤ) → (𝐵 − 𝐴) ∈ ℤ) | |
| 22 | 19, 20, 21 | syl2anr 597 | . . . . 5 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → (𝐵 − 𝐴) ∈ ℤ) |
| 23 | rpexpcl 14001 | . . . . 5 ⊢ (((1 / 2) ∈ ℝ+ ∧ (𝐵 − 𝐴) ∈ ℤ) → ((1 / 2)↑(𝐵 − 𝐴)) ∈ ℝ+) | |
| 24 | 18, 22, 23 | sylancr 587 | . . . 4 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → ((1 / 2)↑(𝐵 − 𝐴)) ∈ ℝ+) |
| 25 | 15, 24 | rpmulcld 12963 | . . 3 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → ((2↑-(!‘𝐴)) · ((1 / 2)↑(𝐵 − 𝐴))) ∈ ℝ+) |
| 26 | 25 | rpred 12947 | . 2 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → ((2↑-(!‘𝐴)) · ((1 / 2)↑(𝐵 − 𝐴))) ∈ ℝ) |
| 27 | 7, 26 | eqeltrd 2834 | 1 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → (𝐺‘𝐵) ∈ ℝ) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1541 ∈ wcel 2113 ↦ cmpt 5177 ‘cfv 6490 (class class class)co 7356 ℝcr 11023 1c1 11025 · cmul 11029 − cmin 11362 -cneg 11363 / cdiv 11792 ℕcn 12143 2c2 12198 ℤcz 12486 ℤ≥cuz 12749 ℝ+crp 12903 ↑cexp 13982 !cfa 14194 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2706 ax-sep 5239 ax-nul 5249 ax-pow 5308 ax-pr 5375 ax-un 7678 ax-cnex 11080 ax-resscn 11081 ax-1cn 11082 ax-icn 11083 ax-addcl 11084 ax-addrcl 11085 ax-mulcl 11086 ax-mulrcl 11087 ax-mulcom 11088 ax-addass 11089 ax-mulass 11090 ax-distr 11091 ax-i2m1 11092 ax-1ne0 11093 ax-1rid 11094 ax-rnegex 11095 ax-rrecex 11096 ax-cnre 11097 ax-pre-lttri 11098 ax-pre-lttrn 11099 ax-pre-ltadd 11100 ax-pre-mulgt0 11101 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-nel 3035 df-ral 3050 df-rex 3059 df-rmo 3348 df-reu 3349 df-rab 3398 df-v 3440 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-iun 4946 df-br 5097 df-opab 5159 df-mpt 5178 df-tr 5204 df-id 5517 df-eprel 5522 df-po 5530 df-so 5531 df-fr 5575 df-we 5577 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-pred 6257 df-ord 6318 df-on 6319 df-lim 6320 df-suc 6321 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-riota 7313 df-ov 7359 df-oprab 7360 df-mpo 7361 df-om 7807 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-rdg 8339 df-er 8633 df-en 8882 df-dom 8883 df-sdom 8884 df-pnf 11166 df-mnf 11167 df-xr 11168 df-ltxr 11169 df-le 11170 df-sub 11364 df-neg 11365 df-div 11793 df-nn 12144 df-2 12206 df-n0 12400 df-z 12487 df-uz 12750 df-rp 12904 df-seq 13923 df-exp 13983 df-fac 14195 |
| This theorem is referenced by: aaliou3lem2 26305 aaliou3lem3 26306 |
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