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Mirrors > Home > MPE Home > Th. List > sqrlem1 | Structured version Visualization version GIF version |
Description: Lemma for 01sqrex 13990. (Contributed by Mario Carneiro, 10-Jul-2013.) |
Ref | Expression |
---|---|
sqrlem1.1 | ⊢ 𝑆 = {𝑥 ∈ ℝ+ ∣ (𝑥↑2) ≤ 𝐴} |
sqrlem1.2 | ⊢ 𝐵 = sup(𝑆, ℝ, < ) |
Ref | Expression |
---|---|
sqrlem1 | ⊢ ((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) → ∀𝑦 ∈ 𝑆 𝑦 ≤ 1) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | oveq1 6657 | . . . . 5 ⊢ (𝑥 = 𝑦 → (𝑥↑2) = (𝑦↑2)) | |
2 | 1 | breq1d 4663 | . . . 4 ⊢ (𝑥 = 𝑦 → ((𝑥↑2) ≤ 𝐴 ↔ (𝑦↑2) ≤ 𝐴)) |
3 | sqrlem1.1 | . . . 4 ⊢ 𝑆 = {𝑥 ∈ ℝ+ ∣ (𝑥↑2) ≤ 𝐴} | |
4 | 2, 3 | elrab2 3366 | . . 3 ⊢ (𝑦 ∈ 𝑆 ↔ (𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴)) |
5 | simprr 796 | . . . . . . 7 ⊢ (((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) ∧ (𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴)) → (𝑦↑2) ≤ 𝐴) | |
6 | simplr 792 | . . . . . . 7 ⊢ (((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) ∧ (𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴)) → 𝐴 ≤ 1) | |
7 | rpre 11839 | . . . . . . . . . 10 ⊢ (𝑦 ∈ ℝ+ → 𝑦 ∈ ℝ) | |
8 | 7 | ad2antrl 764 | . . . . . . . . 9 ⊢ (((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) ∧ (𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴)) → 𝑦 ∈ ℝ) |
9 | 8 | resqcld 13035 | . . . . . . . 8 ⊢ (((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) ∧ (𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴)) → (𝑦↑2) ∈ ℝ) |
10 | rpre 11839 | . . . . . . . . 9 ⊢ (𝐴 ∈ ℝ+ → 𝐴 ∈ ℝ) | |
11 | 10 | ad2antrr 762 | . . . . . . . 8 ⊢ (((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) ∧ (𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴)) → 𝐴 ∈ ℝ) |
12 | 1re 10039 | . . . . . . . . 9 ⊢ 1 ∈ ℝ | |
13 | letr 10131 | . . . . . . . . 9 ⊢ (((𝑦↑2) ∈ ℝ ∧ 𝐴 ∈ ℝ ∧ 1 ∈ ℝ) → (((𝑦↑2) ≤ 𝐴 ∧ 𝐴 ≤ 1) → (𝑦↑2) ≤ 1)) | |
14 | 12, 13 | mp3an3 1413 | . . . . . . . 8 ⊢ (((𝑦↑2) ∈ ℝ ∧ 𝐴 ∈ ℝ) → (((𝑦↑2) ≤ 𝐴 ∧ 𝐴 ≤ 1) → (𝑦↑2) ≤ 1)) |
15 | 9, 11, 14 | syl2anc 693 | . . . . . . 7 ⊢ (((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) ∧ (𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴)) → (((𝑦↑2) ≤ 𝐴 ∧ 𝐴 ≤ 1) → (𝑦↑2) ≤ 1)) |
16 | 5, 6, 15 | mp2and 715 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) ∧ (𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴)) → (𝑦↑2) ≤ 1) |
17 | sq1 12958 | . . . . . 6 ⊢ (1↑2) = 1 | |
18 | 16, 17 | syl6breqr 4695 | . . . . 5 ⊢ (((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) ∧ (𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴)) → (𝑦↑2) ≤ (1↑2)) |
19 | rpge0 11845 | . . . . . . 7 ⊢ (𝑦 ∈ ℝ+ → 0 ≤ 𝑦) | |
20 | 19 | ad2antrl 764 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) ∧ (𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴)) → 0 ≤ 𝑦) |
21 | 0le1 10551 | . . . . . . 7 ⊢ 0 ≤ 1 | |
22 | le2sq 12938 | . . . . . . 7 ⊢ (((𝑦 ∈ ℝ ∧ 0 ≤ 𝑦) ∧ (1 ∈ ℝ ∧ 0 ≤ 1)) → (𝑦 ≤ 1 ↔ (𝑦↑2) ≤ (1↑2))) | |
23 | 12, 21, 22 | mpanr12 721 | . . . . . 6 ⊢ ((𝑦 ∈ ℝ ∧ 0 ≤ 𝑦) → (𝑦 ≤ 1 ↔ (𝑦↑2) ≤ (1↑2))) |
24 | 8, 20, 23 | syl2anc 693 | . . . . 5 ⊢ (((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) ∧ (𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴)) → (𝑦 ≤ 1 ↔ (𝑦↑2) ≤ (1↑2))) |
25 | 18, 24 | mpbird 247 | . . . 4 ⊢ (((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) ∧ (𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴)) → 𝑦 ≤ 1) |
26 | 25 | ex 450 | . . 3 ⊢ ((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) → ((𝑦 ∈ ℝ+ ∧ (𝑦↑2) ≤ 𝐴) → 𝑦 ≤ 1)) |
27 | 4, 26 | syl5bi 232 | . 2 ⊢ ((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) → (𝑦 ∈ 𝑆 → 𝑦 ≤ 1)) |
28 | 27 | ralrimiv 2965 | 1 ⊢ ((𝐴 ∈ ℝ+ ∧ 𝐴 ≤ 1) → ∀𝑦 ∈ 𝑆 𝑦 ≤ 1) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 196 ∧ wa 384 = wceq 1483 ∈ wcel 1990 ∀wral 2912 {crab 2916 class class class wbr 4653 (class class class)co 6650 supcsup 8346 ℝcr 9935 0cc0 9936 1c1 9937 < clt 10074 ≤ cle 10075 2c2 11070 ℝ+crp 11832 ↑cexp 12860 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 ax-cnex 9992 ax-resscn 9993 ax-1cn 9994 ax-icn 9995 ax-addcl 9996 ax-addrcl 9997 ax-mulcl 9998 ax-mulrcl 9999 ax-mulcom 10000 ax-addass 10001 ax-mulass 10002 ax-distr 10003 ax-i2m1 10004 ax-1ne0 10005 ax-1rid 10006 ax-rnegex 10007 ax-rrecex 10008 ax-cnre 10009 ax-pre-lttri 10010 ax-pre-lttrn 10011 ax-pre-ltadd 10012 ax-pre-mulgt0 10013 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-nel 2898 df-ral 2917 df-rex 2918 df-reu 2919 df-rmo 2920 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-pss 3590 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-tp 4182 df-op 4184 df-uni 4437 df-iun 4522 df-br 4654 df-opab 4713 df-mpt 4730 df-tr 4753 df-id 5024 df-eprel 5029 df-po 5035 df-so 5036 df-fr 5073 df-we 5075 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-pred 5680 df-ord 5726 df-on 5727 df-lim 5728 df-suc 5729 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 df-riota 6611 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-om 7066 df-2nd 7169 df-wrecs 7407 df-recs 7468 df-rdg 7506 df-er 7742 df-en 7956 df-dom 7957 df-sdom 7958 df-pnf 10076 df-mnf 10077 df-xr 10078 df-ltxr 10079 df-le 10080 df-sub 10268 df-neg 10269 df-div 10685 df-nn 11021 df-2 11079 df-n0 11293 df-z 11378 df-uz 11688 df-rp 11833 df-seq 12802 df-exp 12861 |
This theorem is referenced by: sqrlem3 13985 sqrlem4 13986 |
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