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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 5798 tfrlemi14d 6608 tfrexlem 6609 tfr1onlemres 6624 tfrcllemres 6637 tfrcldm 6638 erref 6831 1dom1el 7112 en2 7117 en2m 7118 xpdom2 7134 dom0 7143 xpen 7150 mapdom1g 7152 phplem4dom 7168 phplem4on 7174 fidceq 7176 dif1en 7188 fin0 7194 fin0or 7195 isinfinf 7206 eqsndc 7215 infm 7216 en2eqpr 7219 fiuni 7318 supelti 7349 djudom 7440 difinfsn 7447 enomnilem 7485 enmkvlem 7508 enwomnilem 7516 exmidfodomrlemim 7560 exmidaclem 7571 cc2lem 7639 cc3 7641 genpml 7891 genpmu 7892 ltexprlemm 7974 ltexprlemfl 7983 ltexprlemfu 7985 suplocsr 8183 axpre-suploc 8276 eqord1 8819 nn1suc 9333 nninfdcex 10690 zsupssdc 10691 seq3f1oleml 10975 zfz1isolem1 11315 eulerth 13041 4sqlem14 13213 4sqlem17 13216 4sqlem18 13217 ennnfonelemim 13374 exmidunben 13376 enctlem 13382 ctiunct 13390 unct 13392 omctfn 13393 omiunct 13394 relelbasov 13475 issubg2m 14052 gsump1 14248 gsumf1ofi 14251 gsummhmfi 14265 gsumressfi 14268 opprringb 14496 lmff 15487 txcn 15513 suplociccreex 15862 suplociccex 15863 wlkvtxiedg 16803 wlkvtxiedgg 16804 wlkreslem 16836 eulerpathum 16939 3dom 17235 subctctexmid 17247 exmidsbthrlem 17285 sbthom 17289 |
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