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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 710 | . . 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 708 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-io 709 |
This theorem depends on definitions: df-bi 117 |
This theorem is referenced by: pm2.67-2 713 pm1.4 727 orci 731 orcd 733 orcs 735 pm2.45 738 biorfi 746 pm1.5 765 pm2.4 778 pm4.44 779 pm4.78i 782 pm4.45 784 pm3.48 785 pm2.76 808 orabs 814 ordi 816 andi 818 pm4.72 827 biort 829 dcim 841 pm2.54dc 891 pm2.85dc 905 dcor 935 pm5.71dc 961 dedlema 969 3mix1 1166 xoranor 1377 19.33 1484 hbor 1546 nford 1567 19.30dc 1627 19.43 1628 19.32r 1680 moor 2097 r19.32r 2623 ssun1 3298 undif3ss 3396 reuun1 3417 prmg 3713 opthpr 3771 exmidn0m 4199 issod 4317 elelsuc 4407 ordtri2or2exmidlem 4523 regexmidlem1 4530 nndceq 6495 nndcel 6496 swoord1 6559 swoord2 6560 exmidontri2or 7237 addlocprlem 7529 msqge0 8567 mulge0 8570 ltleap 8583 nn1m1nn 8931 elnnz 9257 zletric 9291 zlelttric 9292 zmulcl 9300 zdceq 9322 zdcle 9323 zdclt 9324 ltpnf 9774 xrlttri3 9791 xrpnfdc 9836 xrmnfdc 9837 fzdcel 10033 qletric 10237 qlelttric 10238 qdceq 10240 qsqeqor 10623 hashfiv01gt1 10753 isum 11384 iprodap 11579 iprodap0 11581 nn0o1gt2 11900 prm23lt5 12253 bj-trdc 14275 bj-nn0suc0 14473 triap 14548 tridceq 14575 |
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