![]() |
Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
|
Mirrors > Home > MPE Home > Th. List > msq0i | Structured version Visualization version GIF version |
Description: A number is zero iff its square is zero (where square is represented using multiplication). (Contributed by NM, 28-Jul-1999.) |
Ref | Expression |
---|---|
mul0or.1 | ⊢ 𝐴 ∈ ℂ |
Ref | Expression |
---|---|
msq0i | ⊢ ((𝐴 · 𝐴) = 0 ↔ 𝐴 = 0) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | mul0or.1 | . . 3 ⊢ 𝐴 ∈ ℂ | |
2 | mul0or 10992 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ∈ ℂ) → ((𝐴 · 𝐴) = 0 ↔ (𝐴 = 0 ∨ 𝐴 = 0))) | |
3 | 1, 1, 2 | mp2an 685 | . 2 ⊢ ((𝐴 · 𝐴) = 0 ↔ (𝐴 = 0 ∨ 𝐴 = 0)) |
4 | oridm 935 | . 2 ⊢ ((𝐴 = 0 ∨ 𝐴 = 0) ↔ 𝐴 = 0) | |
5 | 3, 4 | bitri 267 | 1 ⊢ ((𝐴 · 𝐴) = 0 ↔ 𝐴 = 0) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 198 ∨ wo 880 = wceq 1658 ∈ wcel 2166 (class class class)co 6905 ℂcc 10250 0cc0 10252 · cmul 10257 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1896 ax-4 1910 ax-5 2011 ax-6 2077 ax-7 2114 ax-8 2168 ax-9 2175 ax-10 2194 ax-11 2209 ax-12 2222 ax-13 2391 ax-ext 2803 ax-sep 5005 ax-nul 5013 ax-pow 5065 ax-pr 5127 ax-un 7209 ax-resscn 10309 ax-1cn 10310 ax-icn 10311 ax-addcl 10312 ax-addrcl 10313 ax-mulcl 10314 ax-mulrcl 10315 ax-mulcom 10316 ax-addass 10317 ax-mulass 10318 ax-distr 10319 ax-i2m1 10320 ax-1ne0 10321 ax-1rid 10322 ax-rnegex 10323 ax-rrecex 10324 ax-cnre 10325 ax-pre-lttri 10326 ax-pre-lttrn 10327 ax-pre-ltadd 10328 ax-pre-mulgt0 10329 |
This theorem depends on definitions: df-bi 199 df-an 387 df-or 881 df-3or 1114 df-3an 1115 df-tru 1662 df-ex 1881 df-nf 1885 df-sb 2070 df-mo 2605 df-eu 2640 df-clab 2812 df-cleq 2818 df-clel 2821 df-nfc 2958 df-ne 3000 df-nel 3103 df-ral 3122 df-rex 3123 df-reu 3124 df-rab 3126 df-v 3416 df-sbc 3663 df-csb 3758 df-dif 3801 df-un 3803 df-in 3805 df-ss 3812 df-nul 4145 df-if 4307 df-pw 4380 df-sn 4398 df-pr 4400 df-op 4404 df-uni 4659 df-br 4874 df-opab 4936 df-mpt 4953 df-id 5250 df-po 5263 df-so 5264 df-xp 5348 df-rel 5349 df-cnv 5350 df-co 5351 df-dm 5352 df-rn 5353 df-res 5354 df-ima 5355 df-iota 6086 df-fun 6125 df-fn 6126 df-f 6127 df-f1 6128 df-fo 6129 df-f1o 6130 df-fv 6131 df-riota 6866 df-ov 6908 df-oprab 6909 df-mpt2 6910 df-er 8009 df-en 8223 df-dom 8224 df-sdom 8225 df-pnf 10393 df-mnf 10394 df-xr 10395 df-ltxr 10396 df-le 10397 df-sub 10587 df-neg 10588 |
This theorem is referenced by: (None) |
Copyright terms: Public domain | W3C validator |