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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 4806 f1o2ndf1 6468 xpdom2 7135 distrlem5prl 7959 distrlem5pru 7960 mulrid 8329 cnegex 8511 recexap 8989 creur 9297 creui 9298 cju 9299 elz2 9725 qre 10040 qaddcl 10050 qnegcl 10051 qmulcl 10052 qreccl 10057 elpqb 10066 fundm2domnop0 11321 replim 11645 prodmodc 12369 odd2np1 12664 opoe 12686 omoe 12687 opeo 12688 omeo 12689 qredeu 12899 pythagtriplem1 13072 pcz 13139 4sqlem1 13195 4sqlem2 13196 4sqlem4 13199 mul4sq 13201 txuni2 15499 blssioo 15796 tgioo 15797 elply 15977 2sqlem2 16456 mul2sq 16457 2sqlem7 16462 upgredgpr 16612 |
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