| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 3484 undif4 3573 issod 4442 onsucelsucexmid 4654 sucprcreg 4673 0elnn 4743 acexmidlemph 6045 nntri3or 6728 swoord1 6798 swoord2 6799 exmidaclem 7517 exmidontri2or 7555 addlocprlem 7852 nqprloc 7862 apreap 8863 zletric 9623 zlelttric 9624 zmulcl 9633 zdceq 9655 zdcle 9656 zdclt 9657 nn0lt2 9662 elnn1uz2 9942 mnflt 10119 mnfltpnf 10121 xrltso 10132 fzdcel 10377 fzm1 10438 qletric 10605 qlelttric 10606 qdceq 10608 qdclt 10609 qsqeqor 11016 zzlesq 11074 nn0o1gt2 12595 prm23lt5 12965 gausslemma2dlem0f 15944 umgrupgr 16124 umgrislfupgrenlem 16142 usgruspgr 16195 konigsbergssiedgwen 16498 bj-fadc 16543 decidin 16586 triap 16830 tridceq 16858 |
| Copyright terms: Public domain | W3C validator |