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| Mirrors > Home > MPE Home > Th. List > 01sqrexlem1 | Structured version Visualization version GIF version | ||
| Description: Lemma for 01sqrex 15151. (Contributed by Mario Carneiro, 10-Jul-2013.) |
| Ref | Expression |
|---|---|
| 01sqrexlem1.1 | ⊢ 𝑆 = {𝑥 ∈ ℝ+ ∣ (𝑥↑2) ≤ 𝐴} |
| 01sqrexlem1.2 | ⊢ 𝐵 = sup(𝑆, ℝ, < ) |
| Ref | Expression |
|---|---|
| 01sqrexlem1 | ⊢ ((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) → ∀𝑦 ∈ 𝑆 𝑦 ≤ 1) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | oveq1 7348 | . . . . 5 ⊢ (𝑥 = 𝑦 → (𝑥↑2) = (𝑦↑2)) | |
| 2 | 1 | breq1d 5096 | . . . 4 ⊢ (𝑥 = 𝑦 → ((𝑥↑2) ≤ 𝐴 ↔ (𝑦↑2) ≤ 𝐴)) |
| 3 | 01sqrexlem1.1 | . . . 4 ⊢ 𝑆 = {𝑥 ∈ ℝ+ ∣ (𝑥↑2) ≤ 𝐴} | |
| 4 | 2, 3 | elrab2 3645 | . . 3 ⊢ (𝑦 ∈ 𝑆 ↔ (𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴)) |
| 5 | simprr 772 | . . . . . . 7 ⊢ (((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) ∧ (𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴)) → (𝑦↑2) ≤ 𝐴) | |
| 6 | simplr 768 | . . . . . . 7 ⊢ (((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) ∧ (𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴)) → 𝐴 ≤ 1) | |
| 7 | rpre 12894 | . . . . . . . . . 10 ⊢ (𝑦 ∈ ℝ+ → 𝑦 ∈ ℝ) | |
| 8 | 7 | ad2antrl 728 | . . . . . . . . 9 ⊢ (((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) ∧ (𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴)) → 𝑦 ∈ ℝ) |
| 9 | 8 | resqcld 14027 | . . . . . . . 8 ⊢ (((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) ∧ (𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴)) → (𝑦↑2) ∈ ℝ) |
| 10 | rpre 12894 | . . . . . . . . 9 ⊢ (𝐴 ∈ ℝ+ → 𝐴 ∈ ℝ) | |
| 11 | 10 | ad2antrr 726 | . . . . . . . 8 ⊢ (((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) ∧ (𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴)) → 𝐴 ∈ ℝ) |
| 12 | 1re 11107 | . . . . . . . . 9 ⊢ 1 ∈ ℝ | |
| 13 | letr 11202 | . . . . . . . . 9 ⊢ (((𝑦↑2) ∈ ℝ ∧ 𝐴 ∈ ℝ ∧ 1 ∈ ℝ) → (((𝑦↑2) ≤ 𝐴 ∧ 𝐴 ≤ 1) → (𝑦↑2) ≤ 1)) | |
| 14 | 12, 13 | mp3an3 1452 | . . . . . . . 8 ⊢ (((𝑦↑2) ∈ ℝ ∧ 𝐴 ∈ ℝ) → (((𝑦↑2) ≤ 𝐴 ∧ 𝐴 ≤ 1) → (𝑦↑2) ≤ 1)) |
| 15 | 9, 11, 14 | syl2anc 584 | . . . . . . 7 ⊢ (((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) ∧ (𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴)) → (((𝑦↑2) ≤ 𝐴 ∧ 𝐴 ≤ 1) → (𝑦↑2) ≤ 1)) |
| 16 | 5, 6, 15 | mp2and 699 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) ∧ (𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴)) → (𝑦↑2) ≤ 1) |
| 17 | sq1 14097 | . . . . . 6 ⊢ (1↑2) = 1 | |
| 18 | 16, 17 | breqtrrdi 5128 | . . . . 5 ⊢ (((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) ∧ (𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴)) → (𝑦↑2) ≤ (1↑2)) |
| 19 | rpge0 12899 | . . . . . . 7 ⊢ (𝑦 ∈ ℝ+ → 0 ≤ 𝑦) | |
| 20 | 19 | ad2antrl 728 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) ∧ (𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴)) → 0 ≤ 𝑦) |
| 21 | 0le1 11635 | . . . . . . 7 ⊢ 0 ≤ 1 | |
| 22 | le2sq 14036 | . . . . . . 7 ⊢ (((𝑦 ∈ ℝ ∧ 0 ≤ 𝑦) ∧ (1 ∈ ℝ ∧ 0 ≤ 1)) → (𝑦 ≤ 1 ↔ (𝑦↑2) ≤ (1↑2))) | |
| 23 | 12, 21, 22 | mpanr12 705 | . . . . . 6 ⊢ ((𝑦 ∈ ℝ ∧ 0 ≤ 𝑦) → (𝑦 ≤ 1 ↔ (𝑦↑2) ≤ (1↑2))) |
| 24 | 8, 20, 23 | syl2anc 584 | . . . . 5 ⊢ (((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) ∧ (𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴)) → (𝑦 ≤ 1 ↔ (𝑦↑2) ≤ (1↑2))) |
| 25 | 18, 24 | mpbird 257 | . . . 4 ⊢ (((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) ∧ (𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴)) → 𝑦 ≤ 1) |
| 26 | 25 | ex 412 | . . 3 ⊢ ((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) → ((𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴) → 𝑦 ≤ 1)) |
| 27 | 4, 26 | biimtrid 242 | . 2 ⊢ ((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) → (𝑦 ∈ 𝑆 → 𝑦 ≤ 1)) |
| 28 | 27 | ralrimiv 3123 | 1 ⊢ ((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) → ∀𝑦 ∈ 𝑆 𝑦 ≤ 1) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1541 ∈ wcel 2111 ∀wral 3047 {crab 3395 class class class wbr 5086 (class class class)co 7341 supcsup 9319 ℝcr 11000 0cc0 11001 1c1 11002 < clt 11141 ≤ cle 11142 2c2 12175 ℝ+crp 12885 ↑cexp 13963 |
| 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 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-sep 5229 ax-nul 5239 ax-pow 5298 ax-pr 5365 ax-un 7663 ax-cnex 11057 ax-resscn 11058 ax-1cn 11059 ax-icn 11060 ax-addcl 11061 ax-addrcl 11062 ax-mulcl 11063 ax-mulrcl 11064 ax-mulcom 11065 ax-addass 11066 ax-mulass 11067 ax-distr 11068 ax-i2m1 11069 ax-1ne0 11070 ax-1rid 11071 ax-rnegex 11072 ax-rrecex 11073 ax-cnre 11074 ax-pre-lttri 11075 ax-pre-lttrn 11076 ax-pre-ltadd 11077 ax-pre-mulgt0 11078 |
| 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 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ne 2929 df-nel 3033 df-ral 3048 df-rex 3057 df-rmo 3346 df-reu 3347 df-rab 3396 df-v 3438 df-sbc 3737 df-csb 3846 df-dif 3900 df-un 3902 df-in 3904 df-ss 3914 df-pss 3917 df-nul 4279 df-if 4471 df-pw 4547 df-sn 4572 df-pr 4574 df-op 4578 df-uni 4855 df-iun 4938 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5506 df-eprel 5511 df-po 5519 df-so 5520 df-fr 5564 df-we 5566 df-xp 5617 df-rel 5618 df-cnv 5619 df-co 5620 df-dm 5621 df-rn 5622 df-res 5623 df-ima 5624 df-pred 6243 df-ord 6304 df-on 6305 df-lim 6306 df-suc 6307 df-iota 6432 df-fun 6478 df-fn 6479 df-f 6480 df-f1 6481 df-fo 6482 df-f1o 6483 df-fv 6484 df-riota 7298 df-ov 7344 df-oprab 7345 df-mpo 7346 df-om 7792 df-2nd 7917 df-frecs 8206 df-wrecs 8237 df-recs 8286 df-rdg 8324 df-er 8617 df-en 8865 df-dom 8866 df-sdom 8867 df-pnf 11143 df-mnf 11144 df-xr 11145 df-ltxr 11146 df-le 11147 df-sub 11341 df-neg 11342 df-div 11770 df-nn 12121 df-2 12183 df-n0 12377 df-z 12464 df-uz 12728 df-rp 12886 df-seq 13904 df-exp 13964 |
| This theorem is referenced by: 01sqrexlem3 15146 01sqrexlem4 15147 |
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