| 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 715 | . . 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 713 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-io 714 |
| This theorem depends on definitions: df-bi 117 |
| This theorem is referenced by: oibabs 719 pm1.4 732 olci 737 pm2.07 742 pm2.46 744 biorf 749 pm1.5 770 pm2.41 781 pm4.78i 787 pm3.48 790 ordi 821 andi 823 pm4.72 832 stdcn 852 pm2.54dc 896 pm2.85dc 910 dcor 941 dedlemb 976 anifpdc 992 xoranor 1419 19.33 1530 hbor 1592 nford 1613 19.30dc 1673 19.43 1674 19.32r 1726 euor2 2136 mooran2 2151 r19.32r 2677 undif3ss 3465 undif4 3554 issod 4410 onsucelsucexmid 4622 sucprcreg 4641 0elnn 4711 acexmidlemph 6000 nntri3or 6647 swoord1 6717 swoord2 6718 exmidaclem 7401 exmidontri2or 7439 addlocprlem 7733 nqprloc 7743 apreap 8745 zletric 9501 zlelttric 9502 zmulcl 9511 zdceq 9533 zdcle 9534 zdclt 9535 nn0lt2 9539 elnn1uz2 9814 mnflt 9991 mnfltpnf 9993 xrltso 10004 fzdcel 10248 fzm1 10308 qletric 10473 qlelttric 10474 qdceq 10476 qdclt 10477 qsqeqor 10884 zzlesq 10942 nn0o1gt2 12432 prm23lt5 12802 gausslemma2dlem0f 15749 umgrupgr 15928 umgrislfupgrenlem 15944 usgruspgr 15997 bj-fadc 16201 decidin 16244 triap 16485 tridceq 16512 |
| Copyright terms: Public domain | W3C validator |