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| Mirrors > Home > MPE Home > Th. List > absvalsq | Structured version Visualization version GIF version | ||
| Description: Square of value of absolute value function. (Contributed by NM, 16-Jan-2006.) |
| Ref | Expression |
|---|---|
| absvalsq | ⊢ (𝐴 ∈ ℂ → ((abs‘𝐴)↑2) = (𝐴 · (∗‘𝐴))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | absval 15166 | . . 3 ⊢ (𝐴 ∈ ℂ → (abs‘𝐴) = (√‘(𝐴 · (∗‘𝐴)))) | |
| 2 | 1 | oveq1d 7376 | . 2 ⊢ (𝐴 ∈ ℂ → ((abs‘𝐴)↑2) = ((√‘(𝐴 · (∗‘𝐴)))↑2)) |
| 3 | cjmulrcl 15072 | . . 3 ⊢ (𝐴 ∈ ℂ → (𝐴 · (∗‘𝐴)) ∈ ℝ) | |
| 4 | cjmulge0 15074 | . . 3 ⊢ (𝐴 ∈ ℂ → 0 ≤ (𝐴 · (∗‘𝐴))) | |
| 5 | resqrtth 15183 | . . 3 ⊢ (((𝐴 · (∗‘𝐴)) ∈ ℝ ∧ 0 ≤ (𝐴 · (∗‘𝐴))) → ((√‘(𝐴 · (∗‘𝐴)))↑2) = (𝐴 · (∗‘𝐴))) | |
| 6 | 3, 4, 5 | syl2anc 585 | . 2 ⊢ (𝐴 ∈ ℂ → ((√‘(𝐴 · (∗‘𝐴)))↑2) = (𝐴 · (∗‘𝐴))) |
| 7 | 2, 6 | eqtrd 2772 | 1 ⊢ (𝐴 ∈ ℂ → ((abs‘𝐴)↑2) = (𝐴 · (∗‘𝐴))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2114 class class class wbr 5099 ‘cfv 6493 (class class class)co 7361 ℂcc 11029 ℝcr 11030 0cc0 11031 · cmul 11036 ≤ cle 11172 2c2 12205 ↑cexp 13989 ∗ccj 15024 √csqrt 15161 abscabs 15162 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5242 ax-nul 5252 ax-pow 5311 ax-pr 5378 ax-un 7683 ax-cnex 11087 ax-resscn 11088 ax-1cn 11089 ax-icn 11090 ax-addcl 11091 ax-addrcl 11092 ax-mulcl 11093 ax-mulrcl 11094 ax-mulcom 11095 ax-addass 11096 ax-mulass 11097 ax-distr 11098 ax-i2m1 11099 ax-1ne0 11100 ax-1rid 11101 ax-rnegex 11102 ax-rrecex 11103 ax-cnre 11104 ax-pre-lttri 11105 ax-pre-lttrn 11106 ax-pre-ltadd 11107 ax-pre-mulgt0 11108 ax-pre-sup 11109 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3062 df-rmo 3351 df-reu 3352 df-rab 3401 df-v 3443 df-sbc 3742 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4287 df-if 4481 df-pw 4557 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4865 df-iun 4949 df-br 5100 df-opab 5162 df-mpt 5181 df-tr 5207 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-pred 6260 df-ord 6321 df-on 6322 df-lim 6323 df-suc 6324 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-riota 7318 df-ov 7364 df-oprab 7365 df-mpo 7366 df-om 7812 df-2nd 7937 df-frecs 8226 df-wrecs 8257 df-recs 8306 df-rdg 8344 df-er 8638 df-en 8889 df-dom 8890 df-sdom 8891 df-sup 9350 df-pnf 11173 df-mnf 11174 df-xr 11175 df-ltxr 11176 df-le 11177 df-sub 11371 df-neg 11372 df-div 11800 df-nn 12151 df-2 12213 df-3 12214 df-n0 12407 df-z 12494 df-uz 12757 df-rp 12911 df-seq 13930 df-exp 13990 df-cj 15027 df-re 15028 df-im 15029 df-sqrt 15163 df-abs 15164 |
| This theorem is referenced by: absvalsq2 15209 sqabsadd 15210 sqabssub 15211 absresq 15230 recval 15251 abs1m 15264 abslem2 15268 sqreulem 15288 absvalsqi 15322 absvalsqd 15373 isosctrlem2 26790 |
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