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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 2138 mooran2 2153 r19.32r 2680 undif3ss 3470 undif4 3559 issod 4422 onsucelsucexmid 4634 sucprcreg 4653 0elnn 4723 acexmidlemph 6021 nntri3or 6704 swoord1 6774 swoord2 6775 exmidaclem 7483 exmidontri2or 7521 addlocprlem 7815 nqprloc 7825 apreap 8826 zletric 9584 zlelttric 9585 zmulcl 9594 zdceq 9616 zdcle 9617 zdclt 9618 nn0lt2 9622 elnn1uz2 9902 mnflt 10079 mnfltpnf 10081 xrltso 10092 fzdcel 10337 fzm1 10397 qletric 10564 qlelttric 10565 qdceq 10567 qdclt 10568 qsqeqor 10975 zzlesq 11033 nn0o1gt2 12546 prm23lt5 12916 gausslemma2dlem0f 15873 umgrupgr 16053 umgrislfupgrenlem 16071 usgruspgr 16124 konigsbergssiedgwen 16427 bj-fadc 16472 decidin 16515 triap 16761 tridceq 16789 |
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