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| Mirrors > Home > ILE Home > Th. List > orc | GIF version | ||
| Description: Introduction of a disjunct. Theorem *2.2 of [WhiteheadRussell] p. 104. (Contributed by NM, 30-Aug-1993.) (Revised by NM, 31-Jan-2015.) |
| Ref | Expression |
|---|---|
| orc | ⊢ (𝜑 → (𝜑 ∨ 𝜓)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | id 19 | . . 3 ⊢ ((𝜑 ∨ 𝜓) → (𝜑 ∨ 𝜓)) | |
| 2 | jaob 715 | . . 3 ⊢ (((𝜑 ∨ 𝜓) → (𝜑 ∨ 𝜓)) ↔ ((𝜑 → (𝜑 ∨ 𝜓)) ∧ (𝜓 → (𝜑 ∨ 𝜓)))) | |
| 3 | 1, 2 | mpbi 145 | . 2 ⊢ ((𝜑 → (𝜑 ∨ 𝜓)) ∧ (𝜓 → (𝜑 ∨ 𝜓))) |
| 4 | 3 | simpli 111 | 1 ⊢ (𝜑 → (𝜑 ∨ 𝜓)) |
| 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-io 714 |
| This theorem depends on definitions: df-bi 117 |
| This theorem is referenced by: pm2.67-2 718 pm1.4 732 orci 736 orcd 738 orcs 740 pm2.45 743 biorfi 751 pm1.5 770 pm2.4 783 pm4.44 784 pm4.78i 787 pm4.45 789 pm3.48 790 pm2.76 813 orabs 819 ordi 821 andi 823 pm4.72 832 biort 834 dcim 846 pm2.54dc 896 pm2.85dc 910 dcor 941 pm5.71dc 967 dedlema 975 3mix1 1190 xoranor 1419 19.33 1530 hbor 1592 nford 1613 19.30dc 1673 19.43 1674 19.32r 1726 moor 2149 r19.32r 2677 ssun1 3367 undif3ss 3465 reuun1 3486 prmg 3789 opthpr 3850 exmidn0m 4286 issod 4411 elelsuc 4501 ordtri2or2exmidlem 4619 regexmidlem1 4626 fununmo 5366 nndceq 6658 nndcel 6659 swoord1 6722 swoord2 6723 exmidontri2or 7444 addlocprlem 7738 msqge0 8779 mulge0 8782 ltleap 8795 nn1m1nn 9144 elnnz 9472 zletric 9506 zlelttric 9507 zmulcl 9516 zdceq 9538 zdcle 9539 zdclt 9540 ltpnf 9993 xrlttri3 10010 xrpnfdc 10055 xrmnfdc 10056 fzdcel 10253 qletric 10478 qlelttric 10479 qdceq 10481 qdclt 10482 qsqeqor 10889 hashfiv01gt1 11021 isum 11917 iprodap 12112 iprodap0 12114 nn0o1gt2 12437 prm23lt5 12807 4sqlem17 12951 gausslemma2dlem0f 15754 bj-trdc 16225 bj-nn0suc0 16422 triap 16511 tridceq 16538 |
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