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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 710 | . . 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 708 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-io 709 |
This theorem depends on definitions: df-bi 117 |
This theorem is referenced by: oibabs 714 pm1.4 727 olci 732 pm2.07 737 pm2.46 739 biorf 744 pm1.5 765 pm2.41 776 pm4.78i 782 pm3.48 785 ordi 816 andi 818 pm4.72 827 stdcn 847 pm2.54dc 891 pm2.85dc 905 dcor 935 dedlemb 970 xoranor 1377 19.33 1484 hbor 1546 nford 1567 19.30dc 1627 19.43 1628 19.32r 1680 euor2 2084 mooran2 2099 r19.32r 2623 undif3ss 3396 undif4 3485 issod 4317 onsucelsucexmid 4527 sucprcreg 4546 0elnn 4616 acexmidlemph 5863 nntri3or 6489 swoord1 6559 swoord2 6560 exmidaclem 7202 exmidontri2or 7237 addlocprlem 7529 nqprloc 7539 apreap 8538 zletric 9291 zlelttric 9292 zmulcl 9300 zdceq 9322 zdcle 9323 zdclt 9324 nn0lt2 9328 elnn1uz2 9601 mnflt 9777 mnfltpnf 9779 xrltso 9790 fzdcel 10033 fzm1 10093 qletric 10237 qlelttric 10238 qdceq 10240 qsqeqor 10623 nn0o1gt2 11900 prm23lt5 12253 bj-fadc 14277 decidin 14320 triap 14548 tridceq 14575 |
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