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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 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 4411 onsucelsucexmid 4623 sucprcreg 4642 0elnn 4712 acexmidlemph 6003 nntri3or 6652 swoord1 6722 swoord2 6723 exmidaclem 7406 exmidontri2or 7444 addlocprlem 7738 nqprloc 7748 apreap 8750 zletric 9506 zlelttric 9507 zmulcl 9516 zdceq 9538 zdcle 9539 zdclt 9540 nn0lt2 9544 elnn1uz2 9819 mnflt 9996 mnfltpnf 9998 xrltso 10009 fzdcel 10253 fzm1 10313 qletric 10478 qlelttric 10479 qdceq 10481 qdclt 10482 qsqeqor 10889 zzlesq 10947 nn0o1gt2 12437 prm23lt5 12807 gausslemma2dlem0f 15754 umgrupgr 15933 umgrislfupgrenlem 15949 usgruspgr 16002 bj-fadc 16227 decidin 16270 triap 16511 tridceq 16538 |
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