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Mirrors > Home > MPE Home > Th. List > Mathboxes > bj-restn0b | Structured version Visualization version GIF version |
Description: Alternate version of bj-restn0 35188. (Contributed by BJ, 27-Apr-2021.) |
Ref | Expression |
---|---|
bj-restn0b | ⊢ ((𝑋 ∈ (𝑉 ∖ {∅}) ∧ 𝐴 ∈ 𝑊) → (𝑋 ↾t 𝐴) ≠ ∅) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eldifi 4057 | . . . . 5 ⊢ (𝑋 ∈ (𝑉 ∖ {∅}) → 𝑋 ∈ 𝑉) | |
2 | eldifsni 4720 | . . . . 5 ⊢ (𝑋 ∈ (𝑉 ∖ {∅}) → 𝑋 ≠ ∅) | |
3 | 1, 2 | jca 511 | . . . 4 ⊢ (𝑋 ∈ (𝑉 ∖ {∅}) → (𝑋 ∈ 𝑉 ∧ 𝑋 ≠ ∅)) |
4 | 3 | anim1i 614 | . . 3 ⊢ ((𝑋 ∈ (𝑉 ∖ {∅}) ∧ 𝐴 ∈ 𝑊) → ((𝑋 ∈ 𝑉 ∧ 𝑋 ≠ ∅) ∧ 𝐴 ∈ 𝑊)) |
5 | an32 642 | . . 3 ⊢ (((𝑋 ∈ 𝑉 ∧ 𝑋 ≠ ∅) ∧ 𝐴 ∈ 𝑊) ↔ ((𝑋 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) ∧ 𝑋 ≠ ∅)) | |
6 | 4, 5 | sylib 217 | . 2 ⊢ ((𝑋 ∈ (𝑉 ∖ {∅}) ∧ 𝐴 ∈ 𝑊) → ((𝑋 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) ∧ 𝑋 ≠ ∅)) |
7 | bj-restn0 35188 | . . 3 ⊢ ((𝑋 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → (𝑋 ≠ ∅ → (𝑋 ↾t 𝐴) ≠ ∅)) | |
8 | 7 | imp 406 | . 2 ⊢ (((𝑋 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) ∧ 𝑋 ≠ ∅) → (𝑋 ↾t 𝐴) ≠ ∅) |
9 | 6, 8 | syl 17 | 1 ⊢ ((𝑋 ∈ (𝑉 ∖ {∅}) ∧ 𝐴 ∈ 𝑊) → (𝑋 ↾t 𝐴) ≠ ∅) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 ∈ wcel 2108 ≠ wne 2942 ∖ cdif 3880 ∅c0 4253 {csn 4558 (class class class)co 7255 ↾t crest 17048 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pr 5347 ax-un 7566 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-ral 3068 df-rex 3069 df-reu 3070 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4254 df-if 4457 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4837 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-id 5480 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-ov 7258 df-oprab 7259 df-mpo 7260 df-rest 17050 |
This theorem is referenced by: (None) |
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