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| Mirrors > Home > ILE Home > Th. List > exlimddv | GIF version | ||
| Description: Existential elimination rule of natural deduction. (Contributed by Mario Carneiro, 15-Jun-2016.) |
| Ref | Expression |
|---|---|
| exlimddv.1 | ⊢ (𝜑 → ∃𝑥𝜓) |
| exlimddv.2 | ⊢ ((𝜑 ∧ 𝜓) → 𝜒) |
| Ref | Expression |
|---|---|
| exlimddv | ⊢ (𝜑 → 𝜒) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | exlimddv.1 | . 2 ⊢ (𝜑 → ∃𝑥𝜓) | |
| 2 | exlimddv.2 | . . . 4 ⊢ ((𝜑 ∧ 𝜓) → 𝜒) | |
| 3 | 2 | ex 115 | . . 3 ⊢ (𝜑 → (𝜓 → 𝜒)) |
| 4 | 3 | exlimdv 1872 | . 2 ⊢ (𝜑 → (∃𝑥𝜓 → 𝜒)) |
| 5 | 1, 4 | mpd 13 | 1 ⊢ (𝜑 → 𝜒) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 104 ∃wex 1545 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia3 108 ax-5 1500 ax-gen 1502 ax-ie2 1547 ax-17 1579 |
| This proof depends on definitions: df-bi 117 |
| This theorem is used by: fvmptdv2 5795 tfrlemi14d 6604 tfrexlem 6605 tfr1onlemres 6620 tfrcllemres 6633 tfrcldm 6634 erref 6827 1dom1el 7107 en2 7112 en2m 7113 xpdom2 7129 dom0 7138 xpen 7145 mapdom1g 7147 phplem4dom 7163 phplem4on 7169 fidceq 7171 dif1en 7183 fin0 7189 fin0or 7190 isinfinf 7201 eqsndc 7210 infm 7211 en2eqpr 7214 fiuni 7312 supelti 7343 djudom 7434 difinfsn 7441 enomnilem 7479 enmkvlem 7502 enwomnilem 7510 exmidfodomrlemim 7554 exmidaclem 7565 cc2lem 7633 cc3 7635 genpml 7885 genpmu 7886 ltexprlemm 7968 ltexprlemfl 7977 ltexprlemfu 7979 suplocsr 8177 axpre-suploc 8270 eqord1 8813 nn1suc 9326 nninfdcex 10683 zsupssdc 10684 seq3f1oleml 10967 zfz1isolem1 11307 eulerth 13033 4sqlem14 13205 4sqlem17 13208 4sqlem18 13209 ennnfonelemim 13366 exmidunben 13368 enctlem 13374 ctiunct 13382 unct 13384 omctfn 13385 omiunct 13386 relelbasov 13467 issubg2m 14043 gsump1 14208 gsumf1ofi 14211 gsummhmfi 14215 gsumressfi 14218 opprringb 14437 lmff 15402 txcn 15428 suplociccreex 15777 suplociccex 15778 wlkvtxiedg 16708 wlkvtxiedgg 16709 wlkreslem 16741 eulerpathum 16844 3dom 17140 subctctexmid 17152 exmidsbthrlem 17189 sbthom 17193 |
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