| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 3368 undif3ss 3466 reuun1 3487 prmg 3792 opthpr 3853 exmidn0m 4289 issod 4414 elelsuc 4504 ordtri2or2exmidlem 4622 regexmidlem1 4629 fununmo 5369 nndceq 6662 nndcel 6663 swoord1 6726 swoord2 6727 exmidontri2or 7454 addlocprlem 7748 msqge0 8789 mulge0 8792 ltleap 8805 nn1m1nn 9154 elnnz 9482 zletric 9516 zlelttric 9517 zmulcl 9526 zdceq 9548 zdcle 9549 zdclt 9550 ltpnf 10008 xrlttri3 10025 xrpnfdc 10070 xrmnfdc 10071 fzdcel 10268 qletric 10494 qlelttric 10495 qdceq 10497 qdclt 10498 qsqeqor 10905 hashfiv01gt1 11037 isum 11939 iprodap 12134 iprodap0 12136 nn0o1gt2 12459 prm23lt5 12829 4sqlem17 12973 gausslemma2dlem0f 15776 bj-trdc 16298 bj-nn0suc0 16495 triap 16583 tridceq 16610 |
| Copyright terms: Public domain | W3C validator |