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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 722 | . . 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 720 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-io 721 |
| This theorem depends on definitions: df-bi 117 |
| This theorem is referenced by: oibabs 726 pm1.4 739 olci 744 pm2.07 749 pm2.46 751 biorf 756 pm1.5 777 pm2.41 788 pm4.78i 794 pm3.48 797 ordi 828 andi 830 pm4.72 839 stdcn 859 pm2.54dc 903 pm2.85dc 917 dcor 948 dedlemb 983 anifpdc 999 xoranor 1426 19.33 1537 hbor 1599 nford 1620 19.30dc 1680 19.43 1681 19.32r 1732 euor2 2145 mooran2 2160 r19.32r 2697 undif3ss 3492 undif4 3586 issod 4459 onsucelsucexmid 4672 sucprcreg 4691 0elnn 4761 acexmidlemph 6068 nntri3or 6756 swoord1 6826 swoord2 6827 exmidaclem 7554 exmidontri2or 7592 addlocprlem 7892 nqprloc 7902 apreap 8905 zletric 9667 zlelttric 9668 zmulcl 9677 zdceq 9699 zdcle 9700 zdclt 9701 nn0lt2 9706 elnn1uz2 9986 mnflt 10164 mnfltpnf 10166 xrltso 10177 fzdcel 10423 fzm1 10485 qletric 10654 qlelttric 10655 qdceq 10657 qdclt 10658 qsqeqor 11065 zzlesq 11124 nn0o1gt2 12650 prm23lt5 13020 gausslemma2dlem0f 16087 umgrupgr 16267 umgrislfupgrenlem 16285 usgruspgr 16338 konigsbergssiedgwen 16641 bj-fadc 16696 decidin 16739 triap 16983 tridceq 17011 |
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