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| Mirrors > Home > MPE Home > Th. List > Mathboxes > constrnegcl | Structured version Visualization version GIF version | ||
| Description: Constructible numbers are closed under additive inverse. Item (2) of Theorem 7.10 of [Stewart] p. 96. (Contributed by Thierry Arnoux, 2-Nov-2025.) |
| Ref | Expression |
|---|---|
| constrnegcl.1 | ⊢ (𝜑 → 𝑋 ∈ Constr) |
| Ref | Expression |
|---|---|
| constrnegcl | ⊢ (𝜑 → -𝑋 ∈ Constr) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0nn0 12452 | . . . 4 ⊢ 0 ∈ ℕ0 | |
| 2 | 1 | a1i 11 | . . 3 ⊢ (𝜑 → 0 ∈ ℕ0) |
| 3 | 2 | nn0constr 33905 | . 2 ⊢ (𝜑 → 0 ∈ Constr) |
| 4 | constrnegcl.1 | . 2 ⊢ (𝜑 → 𝑋 ∈ Constr) | |
| 5 | 1red 11145 | . . 3 ⊢ (𝜑 → 1 ∈ ℝ) | |
| 6 | 5 | renegcld 11577 | . 2 ⊢ (𝜑 → -1 ∈ ℝ) |
| 7 | 4 | constrcn 33904 | . . 3 ⊢ (𝜑 → 𝑋 ∈ ℂ) |
| 8 | 7 | negcld 11492 | . 2 ⊢ (𝜑 → -𝑋 ∈ ℂ) |
| 9 | 6 | recnd 11173 | . . . . 5 ⊢ (𝜑 → -1 ∈ ℂ) |
| 10 | 7 | subid1d 11494 | . . . . . 6 ⊢ (𝜑 → (𝑋 − 0) = 𝑋) |
| 11 | 10, 7 | eqeltrd 2836 | . . . . 5 ⊢ (𝜑 → (𝑋 − 0) ∈ ℂ) |
| 12 | 9, 11 | mulcld 11165 | . . . 4 ⊢ (𝜑 → (-1 · (𝑋 − 0)) ∈ ℂ) |
| 13 | 12 | addlidd 11347 | . . 3 ⊢ (𝜑 → (0 + (-1 · (𝑋 − 0))) = (-1 · (𝑋 − 0))) |
| 14 | 11 | mulm1d 11602 | . . 3 ⊢ (𝜑 → (-1 · (𝑋 − 0)) = -(𝑋 − 0)) |
| 15 | 10 | negeqd 11387 | . . 3 ⊢ (𝜑 → -(𝑋 − 0) = -𝑋) |
| 16 | 13, 14, 15 | 3eqtrrd 2776 | . 2 ⊢ (𝜑 → -𝑋 = (0 + (-1 · (𝑋 − 0)))) |
| 17 | 7 | absnegd 15414 | . . 3 ⊢ (𝜑 → (abs‘-𝑋) = (abs‘𝑋)) |
| 18 | 8 | subid1d 11494 | . . . 4 ⊢ (𝜑 → (-𝑋 − 0) = -𝑋) |
| 19 | 18 | fveq2d 6844 | . . 3 ⊢ (𝜑 → (abs‘(-𝑋 − 0)) = (abs‘-𝑋)) |
| 20 | 10 | fveq2d 6844 | . . 3 ⊢ (𝜑 → (abs‘(𝑋 − 0)) = (abs‘𝑋)) |
| 21 | 17, 19, 20 | 3eqtr4d 2781 | . 2 ⊢ (𝜑 → (abs‘(-𝑋 − 0)) = (abs‘(𝑋 − 0))) |
| 22 | 3, 4, 3, 4, 3, 6, 8, 16, 21 | constrlccl 33901 | 1 ⊢ (𝜑 → -𝑋 ∈ Constr) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2114 ‘cfv 6498 (class class class)co 7367 ℂcc 11036 0cc0 11038 1c1 11039 + caddc 11041 · cmul 11043 − cmin 11377 -cneg 11378 ℕ0cn0 12437 abscabs 15196 Constrcconstr 33873 |
| 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 2708 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pow 5307 ax-pr 5375 ax-un 7689 ax-cnex 11094 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 |
| 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 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3062 df-rmo 3342 df-reu 3343 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-pss 3909 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-tp 4572 df-op 4574 df-uni 4851 df-iun 4935 df-br 5086 df-opab 5148 df-mpt 5167 df-tr 5193 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6265 df-ord 6326 df-on 6327 df-lim 6328 df-suc 6329 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-riota 7324 df-ov 7370 df-oprab 7371 df-mpo 7372 df-om 7818 df-2nd 7943 df-frecs 8231 df-wrecs 8262 df-recs 8311 df-rdg 8349 df-1o 8405 df-2o 8406 df-er 8643 df-en 8894 df-dom 8895 df-sdom 8896 df-fin 8897 df-pnf 11181 df-mnf 11182 df-xr 11183 df-ltxr 11184 df-le 11185 df-sub 11379 df-neg 11380 df-div 11808 df-nn 12175 df-2 12244 df-n0 12438 df-z 12525 df-cj 15061 df-re 15062 df-im 15063 df-abs 15198 df-constr 33874 |
| This theorem is referenced by: zconstr 33908 iconstr 33910 constrremulcl 33911 constrimcl 33914 constrmulcl 33915 constrreinvcl 33916 constrsdrg 33919 constrresqrtcl 33921 constrsqrtcl 33923 cos9thpinconstrlem1 33933 |
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