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| Mirrors > Home > ILE Home > Th. List > reeanv | GIF version | ||
| Description: Rearrange existential quantifiers. (Contributed by NM, 9-May-1999.) |
| Ref | Expression |
|---|---|
| reeanv | ⊢ (∃𝑥 ∈ 𝐴 ∃𝑦 ∈ 𝐵 (𝜑 ∧ 𝜓) ↔ (∃𝑥 ∈ 𝐴 𝜑 ∧ ∃𝑦 ∈ 𝐵 𝜓)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nfv 1581 | . 2 ⊢ Ⅎ𝑦𝜑 | |
| 2 | nfv 1581 | . 2 ⊢ Ⅎ𝑥𝜓 | |
| 3 | 1, 2 | reean 2720 | 1 ⊢ (∃𝑥 ∈ 𝐴 ∃𝑦 ∈ 𝐵 (𝜑 ∧ 𝜓) ↔ (∃𝑥 ∈ 𝐴 𝜑 ∧ ∃𝑦 ∈ 𝐵 𝜓)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ∧ wa 104 ↔ wb 105 ∃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-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 |
| This proof depends on definitions: df-bi 117 df-nf 1514 df-sb 1816 df-cleq 2231 df-clel 2234 df-nfc 2381 df-rex 2534 |
| This theorem is used by: 3reeanv 2722 fliftfun 6002 tfrlem5 6585 eroveu 6900 erovlem 6901 xpf1o 7144 genprndl 7888 genprndu 7889 ltpopr 7962 ltsopr 7963 cauappcvgprlemdisj 8018 caucvgprlemdisj 8041 caucvgprprlemdisj 8069 exbtwnzlemex 10694 rebtwn2z 10699 rexanre 12001 summodc 12166 prodmodclem2 12360 prodmodc 12361 dvds2lem 12586 odd2np1 12656 opoe 12678 omoe 12679 opeo 12680 omeo 12681 gcddiv 12812 divgcdcoprmex 12896 pcqmul 13102 pcadd 13139 mul4sq 13193 4sqlem12 13201 dvdsrtr 14457 unitgrp 14472 lss1d 14769 znidom 15041 tgcl 15214 restbasg 15318 txuni2 15406 txbas 15408 txcnp 15421 blin2 15582 tgqioo 15705 plyadd 15901 plymul 15902 mul2sq 16333 2sqlem5 16336 uhgr2edg 16545 |
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