| 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 2116, df-clel 2812. (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 1929 | . 2 ⊢ (𝜑 → ∀𝑥 ¬ 𝑥 ∈ 𝐴) |
| 3 | eq0 4304 | . 2 ⊢ (𝐴 = ∅ ↔ ∀𝑥 ¬ 𝑥 ∈ 𝐴) | |
| 4 | 2, 3 | sylibr 234 | 1 ⊢ (𝜑 → 𝐴 = ∅) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ∀wal 1540 = wceq 1542 ∈ wcel 2114 ∅c0 4287 |
| 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-9 2124 ax-ext 2709 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-dif 3906 df-nul 4288 |
| This theorem is referenced by: map0b 8833 disjen 9074 mapdom1 9082 pwxpndom2 10588 fzdisj 13479 smu01lem 16424 prmreclem5 16860 vdwap0 16916 natfval 17885 fucbas 17899 fuchom 17900 coafval 18000 efgval 19658 lsppratlem6 21119 lbsextlem4 21128 psrvscafval 21916 cfinufil 23884 ufinffr 23885 fin1aufil 23888 bldisj 24354 reconnlem1 24783 pcofval 24978 bcthlem5 25296 volfiniun 25516 fta1g 26143 fta1 26284 rpvmasum 27505 0ringprmidl 33542 0ringmon1p 33650 0ringirng 33867 unblimceq0 36729 bj-ab0 37156 bj-projval 37244 finxpnom 37656 ipo0 44804 ifr0 44805 limclner 46009 iineq0 49179 |
| Copyright terms: Public domain | W3C validator |