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| Mirrors > Home > ILE Home > Th. List > difexg | GIF version | ||
| Description: Existence of a difference. (Contributed by NM, 26-May-1998.) |
| Ref | Expression |
|---|---|
| difexg | ⊢ (𝐴 ∈ 𝑉 → (𝐴 ∖ 𝐵) ∈ V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | difss 3355 | . 2 ⊢ (𝐴 ∖ 𝐵) ⊆ 𝐴 | |
| 2 | ssexg 4274 | . 2 ⊢ (((𝐴 ∖ 𝐵) ⊆ 𝐴 ∧ 𝐴 ∈ 𝑉) → (𝐴 ∖ 𝐵) ∈ V) | |
| 3 | 1, 2 | mpan 428 | 1 ⊢ (𝐴 ∈ 𝑉 → (𝐴 ∖ 𝐵) ∈ V) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2209 Vcvv 2821 ∖ cdif 3217 ⊆ wss 3220 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 ax-sep 4251 |
| This proof depends on definitions: df-bi 117 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-v 2823 df-dif 3222 df-in 3226 df-ss 3233 |
| This theorem is used by: difexi 4278 difexd 4279 frirrg 4497 2oconcl 6716 phplem4dom 7167 fidifsnen 7176 findcard 7196 findcard2 7197 findcard2s 7198 fisseneq 7246 difinfsn 7446 ismkvnex 7501 exmidfodomrlemim 7559 ballotfilem7 13337 ballotfilem8 13338 |
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