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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 717 | . . 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 715 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-io 716 |
| This theorem depends on definitions: df-bi 117 |
| This theorem is referenced by: oibabs 721 pm1.4 734 olci 739 pm2.07 744 pm2.46 746 biorf 751 pm1.5 772 pm2.41 783 pm4.78i 789 pm3.48 792 ordi 823 andi 825 pm4.72 834 stdcn 854 pm2.54dc 898 pm2.85dc 912 dcor 943 dedlemb 978 anifpdc 994 xoranor 1421 19.33 1532 hbor 1594 nford 1615 19.30dc 1675 19.43 1676 19.32r 1728 euor2 2138 mooran2 2153 r19.32r 2679 undif3ss 3468 undif4 3557 issod 4416 onsucelsucexmid 4628 sucprcreg 4647 0elnn 4717 acexmidlemph 6011 nntri3or 6661 swoord1 6731 swoord2 6732 exmidaclem 7423 exmidontri2or 7461 addlocprlem 7755 nqprloc 7765 apreap 8767 zletric 9523 zlelttric 9524 zmulcl 9533 zdceq 9555 zdcle 9556 zdclt 9557 nn0lt2 9561 elnn1uz2 9841 mnflt 10018 mnfltpnf 10020 xrltso 10031 fzdcel 10275 fzm1 10335 qletric 10502 qlelttric 10503 qdceq 10505 qdclt 10506 qsqeqor 10913 zzlesq 10971 nn0o1gt2 12484 prm23lt5 12854 gausslemma2dlem0f 15802 umgrupgr 15982 umgrislfupgrenlem 16000 usgruspgr 16053 konigsbergssiedgwen 16356 bj-fadc 16401 decidin 16444 triap 16684 tridceq 16712 |
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