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| Mirrors > Home > ILE Home > Th. List > rexlimivv | GIF version | ||
| Description: Inference from Theorem 19.23 of [Margaris] p. 90 (restricted quantifier version). (Contributed by NM, 17-Feb-2004.) |
| Ref | Expression |
|---|---|
| rexlimivv.1 | ⊢ ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) → (𝜑 → 𝜓)) |
| Ref | Expression |
|---|---|
| rexlimivv | ⊢ (∃𝑥 ∈ 𝐴 ∃𝑦 ∈ 𝐵 𝜑 → 𝜓) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rexlimivv.1 | . . 3 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) → (𝜑 → 𝜓)) | |
| 2 | 1 | rexlimdva 2668 | . 2 ⊢ (𝑥 ∈ 𝐴 → (∃𝑦 ∈ 𝐵 𝜑 → 𝜓)) |
| 3 | 2 | rexlimiv 2662 | 1 ⊢ (∃𝑥 ∈ 𝐴 ∃𝑦 ∈ 𝐵 𝜑 → 𝜓) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 104 ∈ wcel 2209 ∃wrex 2529 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1500 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-4 1563 ax-17 1579 ax-ial 1587 ax-i5r 1588 |
| This proof depends on definitions: df-bi 117 df-nf 1514 df-ral 2533 df-rex 2534 |
| This theorem is used by: opelxp 4804 f1o2ndf1 6464 xpdom2 7129 distrlem5prl 7954 distrlem5pru 7955 mulrid 8324 cnegex 8506 recexap 8984 creur 9292 creui 9293 cju 9294 elz2 9721 qre 10035 qaddcl 10045 qnegcl 10046 qmulcl 10047 qreccl 10052 elpqb 10061 fundm2domnop0 11316 replim 11640 prodmodc 12364 odd2np1 12659 opoe 12681 omoe 12682 opeo 12683 omeo 12684 qredeu 12894 pythagtriplem1 13067 pcz 13134 4sqlem1 13190 4sqlem2 13191 4sqlem4 13194 mul4sq 13196 txuni2 15448 blssioo 15745 tgioo 15746 elply 15926 2sqlem2 16400 mul2sq 16401 2sqlem7 16406 upgredgpr 16556 |
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