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| Mirrors > Home > ILE Home > Th. List > impexp | GIF version | ||
| Description: Import-export theorem. Part of Theorem *4.87 of [WhiteheadRussell] p. 122. (Contributed by NM, 5-Aug-1993.) (Proof shortened by Wolf Lammen, 24-Mar-2013.) |
| Ref | Expression |
|---|---|
| impexp | ⊢ (((𝜑 ∧ 𝜓) → 𝜒) ↔ (𝜑 → (𝜓 → 𝜒))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pm3.3 261 | . 2 ⊢ (((𝜑 ∧ 𝜓) → 𝜒) → (𝜑 → (𝜓 → 𝜒))) | |
| 2 | pm3.31 262 | . 2 ⊢ ((𝜑 → (𝜓 → 𝜒)) → ((𝜑 ∧ 𝜓) → 𝜒)) | |
| 3 | 1, 2 | impbii 126 | 1 ⊢ (((𝜑 ∧ 𝜓) → 𝜒) ↔ (𝜑 → (𝜓 → 𝜒))) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 104 ↔ wb 105 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 |
| This proof depends on definitions: df-bi 117 |
| This theorem is used by: imp4a 349 exp4a 366 imdistan 448 pm5.3 479 pm4.87 563 nan 703 pm4.14dc 902 pm5.6dc 938 2sb6 2044 2sb6rf 2050 2exsb 2069 mor 2129 eu2 2131 moanim 2161 r2alf 2567 r3al 2594 r19.23t 2658 ceqsralt 2849 rspc2gv 2942 ralrab 2987 ralrab2 2991 euind 3013 reu2 3014 reu3 3016 rmo4 3019 rmo3f 3023 reuind 3031 rmo2ilem 3142 rmo3 3144 ralss 3314 rabss 3325 raldifb 3369 unissb 3965 elintrab 3982 ssintrab 3993 dftr5 4234 repizf2lem 4300 reusv3 4608 tfi 4731 raliunxp 4923 fununi 5452 dff13 5977 dfsmo2 6562 tfr1onlemaccex 6623 tfrcllemaccex 6636 qliftfun 6895 nnnninfeq2 7476 prime 9757 raluz 9995 raluz2 9996 ralrp 10094 facwordi 11201 modfsummod 12251 nnwosdc 12842 isprm2 12921 isprm4 12923 metcnp 15750 limcdifap 15900 bdcriota 17126 nnnninfex 17283 dfrals2 17349 dfralseu2 17383 |
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