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| Mirrors > Home > ILE Home > Th. List > olc | GIF version | ||
| Description: Introduction of a disjunct. Axiom *1.3 of [WhiteheadRussell] p. 96. (Contributed by NM, 30-Aug-1993.) (Revised by NM, 31-Jan-2015.) |
| Ref | Expression |
|---|---|
| olc | ⊢ (𝜑 → (𝜓 ∨ 𝜑)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | id 19 | . . 3 ⊢ ((𝜓 ∨ 𝜑) → (𝜓 ∨ 𝜑)) | |
| 2 | jaob 718 | . . 3 ⊢ (((𝜓 ∨ 𝜑) → (𝜓 ∨ 𝜑)) ↔ ((𝜓 → (𝜓 ∨ 𝜑)) ∧ (𝜑 → (𝜓 ∨ 𝜑)))) | |
| 3 | 1, 2 | mpbi 145 | . 2 ⊢ ((𝜓 → (𝜓 ∨ 𝜑)) ∧ (𝜑 → (𝜓 ∨ 𝜑))) |
| 4 | 3 | simpri 113 | 1 ⊢ (𝜑 → (𝜓 ∨ 𝜑)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ∨ wo 716 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-io 717 |
| This theorem depends on definitions: df-bi 117 |
| This theorem is referenced by: oibabs 722 pm1.4 735 olci 740 pm2.07 745 pm2.46 747 biorf 752 pm1.5 773 pm2.41 784 pm4.78i 790 pm3.48 793 ordi 824 andi 826 pm4.72 835 stdcn 855 pm2.54dc 899 pm2.85dc 913 dcor 944 dedlemb 979 anifpdc 995 xoranor 1422 19.33 1533 hbor 1595 nford 1616 19.30dc 1676 19.43 1677 19.32r 1728 euor2 2141 mooran2 2156 r19.32r 2691 undif3ss 3486 undif4 3575 issod 4445 onsucelsucexmid 4657 sucprcreg 4676 0elnn 4746 acexmidlemph 6051 nntri3or 6739 swoord1 6809 swoord2 6810 exmidaclem 7528 exmidontri2or 7566 addlocprlem 7866 nqprloc 7876 apreap 8878 zletric 9638 zlelttric 9639 zmulcl 9648 zdceq 9670 zdcle 9671 zdclt 9672 nn0lt2 9677 elnn1uz2 9957 mnflt 10135 mnfltpnf 10137 xrltso 10148 fzdcel 10394 fzm1 10456 qletric 10625 qlelttric 10626 qdceq 10628 qdclt 10629 qsqeqor 11036 zzlesq 11095 nn0o1gt2 12616 prm23lt5 12986 gausslemma2dlem0f 16053 umgrupgr 16233 umgrislfupgrenlem 16251 usgruspgr 16304 konigsbergssiedgwen 16607 bj-fadc 16652 decidin 16695 triap 16939 tridceq 16967 |
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