| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > eq0rdv | Structured version Visualization version GIF version | ||
| Description: Deduction for equality to the empty set. (Contributed by NM, 11-Jul-2014.) Avoid ax-8 2147, df-clel 2835. (Revised by GG, 6-Sep-2024.) |
| Ref | Expression |
|---|---|
| eq0rdv.1 | ⊢ (𝜑 → ¬ 𝑥 ∈ 𝐴) |
| Ref | Expression |
|---|---|
| eq0rdv | ⊢ (𝜑 → 𝐴 = ∅) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eq0rdv.1 | . . 3 ⊢ (𝜑 → ¬ 𝑥 ∈ 𝐴) | |
| 2 | 1 | alrimiv 1960 | . 2 ⊢ (𝜑 → ∀𝑥 ¬ 𝑥 ∈ 𝐴) |
| 3 | eq0 4297 | . 2 ⊢ (𝐴 = ∅ ↔ ∀𝑥 ¬ 𝑥 ∈ 𝐴) | |
| 4 | 2, 3 | sylibr 237 | 1 ⊢ (𝜑 → 𝐴 = ∅) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∀wal 1568 = wceq 1570 ∈ wcel 2145 ∅c0 4279 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-9 2155 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2739 df-cleq 2752 df-dif 3902 df-nul 4280 |
| This theorem is used by: map0b 8890 disjen 9132 mapdom1 9140 pwxpndom2 10674 fzdisj 13606 smu01lem 16575 prmreclem5 17012 vdwap0 17068 natfval 18038 fucbas 18052 fuchom 18053 coafval 18153 efgval 19844 lsppratlem6 21339 lbsextlem4 21348 0ringprmidl 21540 psrvscafval 22163 cfinufil 24154 ufinffr 24155 fin1aufil 24158 bldisj 24624 reconnlem1 25053 pcofval 25238 bcthlem5 25556 volfiniun 25775 fta1g 26395 fta1 26538 rpvmasum 27762 0ringmon1p 33967 0ringirng 34199 unblimceq0 37204 bj-ab0 37651 bj-projval 37740 finxpnom 38155 ipo0 45272 ifr0 45273 limclner 46479 iineq0 49748 |
| Copyright terms: Public domain | W3C validator |