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| Mirrors > Home > MPE Home > Th. List > Mathboxes > bj-xtagex | Structured version Visualization version GIF version | ||
| Description: The product of a set and the tagging of a set is a set. (Contributed by BJ, 2-Apr-2019.) |
| Ref | Expression |
|---|---|
| bj-xtagex | ⊢ (𝐴 ∈ 𝑉 → (𝐵 ∈ 𝑊 → (𝐴 × tag 𝐵) ∈ V)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elex 3475 | . . 3 ⊢ (𝐵 ∈ 𝑊 → 𝐵 ∈ V) | |
| 2 | bj-tagex 38077 | . . 3 ⊢ (𝐵 ∈ V ↔ tag 𝐵 ∈ V) | |
| 3 | 1, 2 | sylib 221 | . 2 ⊢ (𝐵 ∈ 𝑊 → tag 𝐵 ∈ V) |
| 4 | bj-xpexg2 38050 | . 2 ⊢ (𝐴 ∈ 𝑉 → (tag 𝐵 ∈ V → (𝐴 × tag 𝐵) ∈ V)) | |
| 5 | 3, 4 | syl5 35 | 1 ⊢ (𝐴 ∈ 𝑉 → (𝐵 ∈ 𝑊 → (𝐴 × tag 𝐵) ∈ V)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2147 Vcvv 3454 × cxp 5653 tag bj-ctag 38064 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-rep 5235 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7772 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-opab 5171 df-xp 5661 df-rel 5662 df-bj-sngl 38056 df-bj-tag 38065 |
| This theorem is used by: bj-1uplex 38098 bj-2uplex 38112 |
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