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| Mirrors > Home > MPE Home > Th. List > aaliou3lem1 | Structured version Visualization version GIF version | ||
| Description: Lemma for aaliou3 26678. (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 7427 | . . . . . 6 ⊢ (𝑐 = 𝐵 → (𝑐 − 𝐴) = (𝐵 − 𝐴)) | |
| 2 | 1 | oveq2d 7436 | . . . . 5 ⊢ (𝑐 = 𝐵 → ((1 / 2)↑(𝑐 − 𝐴)) = ((1 / 2)↑(𝐵 − 𝐴))) |
| 3 | 2 | oveq2d 7436 | . . . 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 7453 | . . . 4 ⊢ ((2↑ -(!‘𝐴)) · ((1 / 2)↑(𝐵 − 𝐴))) ∈ V | |
| 6 | 3, 4, 5 | fvmpt 6993 | . . 3 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (𝐺‘𝐵) = ((2↑ -(!‘𝐴)) · ((1 / 2)↑(𝐵 − 𝐴)))) |
| 7 | 6 | adantl 487 | . 2 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → (𝐺‘𝐵) = ((2↑ -(!‘𝐴)) · ((1 / 2)↑(𝐵 − 𝐴)))) |
| 8 | 2rp 13125 | . . . . 5 ⊢ 2 ∈ ℝ+ | |
| 9 | simpl 488 | . . . . . . . . 9 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → 𝐴 ∈ ℕ) | |
| 10 | 9 | nnnn0d 12667 | . . . . . . . 8 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → 𝐴 ∈ ℕ0) |
| 11 | 10 | faccld 14428 | . . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → (!‘𝐴) ∈ ℕ) |
| 12 | 11 | nnzd 12719 | . . . . . 6 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → (!‘𝐴) ∈ ℤ) |
| 13 | 12 | znegcld 12805 | . . . . 5 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → -(!‘𝐴) ∈ ℤ) |
| 14 | rpexpcl 14223 | . . . . 5 ⊢ ((2 ∈ ℝ+ ∧ -(!‘𝐴) ∈ ℤ) → (2↑ -(!‘𝐴)) ∈ ℝ+) | |
| 15 | 8, 13, 14 | sylancr 599 | . . . 4 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → (2↑ -(!‘𝐴)) ∈ ℝ+) |
| 16 | halfre 12559 | . . . . . 6 ⊢ (1 / 2) ∈ ℝ | |
| 17 | halfgt0 12561 | . . . . . 6 ⊢ 0 < (1 / 2) | |
| 18 | 16, 17 | elrpii 13123 | . . . . 5 ⊢ (1 / 2) ∈ ℝ+ |
| 19 | eluzelz 12975 | . . . . . 6 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 𝐵 ∈ ℤ) | |
| 20 | nnz 12714 | . . . . . 6 ⊢ (𝐴 ∈ ℕ → 𝐴 ∈ ℤ) | |
| 21 | zsubcl 12738 | . . . . . 6 ⊢ ((𝐵 ∈ ℤ ∧ 𝐴 ∈ ℤ) → (𝐵 − 𝐴) ∈ ℤ) | |
| 22 | 19, 20, 21 | syl2anr 609 | . . . . 5 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → (𝐵 − 𝐴) ∈ ℤ) |
| 23 | rpexpcl 14223 | . . . . 5 ⊢ (((1 / 2) ∈ ℝ+ ∧ (𝐵 − 𝐴) ∈ ℤ) → ((1 / 2)↑(𝐵 − 𝐴)) ∈ ℝ+) | |
| 24 | 18, 22, 23 | sylancr 599 | . . . 4 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → ((1 / 2)↑(𝐵 − 𝐴)) ∈ ℝ+) |
| 25 | 15, 24 | rpmulcld 13180 | . . 3 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → ((2↑ -(!‘𝐴)) · ((1 / 2)↑(𝐵 − 𝐴))) ∈ ℝ+) |
| 26 | 25 | rpred 13164 | . 2 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → ((2↑ -(!‘𝐴)) · ((1 / 2)↑(𝐵 − 𝐴))) ∈ ℝ) |
| 27 | 7, 26 | eqeltrd 2861 | 1 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → (𝐺‘𝐵) ∈ ℝ) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ↦ cmpt 5186 ‘cfv 6538 (class class class)co 7420 ℝcr 11199 1c1 11201 · cmul 11205 − cmin 11541 -cneg 11542 / cdiv 11973 ℕcn 12335 2c2 12397 ℤcz 12693 ℤ≥cuz 12965 ℝ+crp 13120 ↑cexp 14204 !cfa 14417 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7751 ax-cnex 11256 ax-resscn 11257 ax-1cn 11258 ax-icn 11259 ax-addcl 11260 ax-addrcl 11261 ax-mulcl 11262 ax-mulrcl 11263 ax-mulcom 11264 ax-addass 11265 ax-mulass 11266 ax-distr 11267 ax-i2m1 11268 ax-1ne0 11269 ax-1rid 11270 ax-rnegex 11271 ax-rrecex 11272 ax-cnre 11273 ax-pre-lttri 11274 ax-pre-lttrn 11275 ax-pre-ltadd 11276 ax-pre-mulgt0 11277 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7878 df-2nd 8002 df-frecs 8299 df-wrecs 8330 df-recs 8379 df-rdg 8418 df-er 8717 df-en 8974 df-dom 8975 df-sdom 8976 df-pnf 11345 df-mnf 11346 df-xr 11347 df-ltxr 11348 df-le 11349 df-sub 11543 df-neg 11544 df-div 11974 df-nn 12336 df-2 12405 df-n0 12607 df-z 12694 df-uz 12966 df-rp 13121 df-seq 14145 df-exp 14205 df-fac 14418 |
| This theorem is used by: aaliou3lem2 26670 aaliou3lem3 26671 |
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