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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 663 | . . 3 ⊢ (((𝜓 ∨ 𝜑) → (𝜓 ∨ 𝜑)) ↔ ((𝜓 → (𝜓 ∨ 𝜑)) ∧ (𝜑 → (𝜓 ∨ 𝜑)))) | |
3 | 1, 2 | mpbi 143 | . 2 ⊢ ((𝜓 → (𝜓 ∨ 𝜑)) ∧ (𝜑 → (𝜓 ∨ 𝜑))) |
4 | 3 | simpri 111 | 1 ⊢ (𝜑 → (𝜓 ∨ 𝜑)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 102 ∨ wo 661 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-io 662 |
This theorem depends on definitions: df-bi 115 |
This theorem is referenced by: pm1.4 678 olci 683 pm2.07 688 pm2.46 690 biorf 695 pm1.5 714 pm2.41 725 pm3.48 731 ordi 762 andi 764 pm4.72 769 pm2.54dc 823 oibabs 833 pm4.78i 841 pm2.85dc 844 dcor 876 dedlemb 911 xoranor 1308 19.33 1413 hbor 1478 nford 1499 19.30dc 1558 19.43 1559 19.32r 1610 euor2 1999 mooran2 2014 r19.32r 2501 undif3ss 3225 undif4 3306 issod 4074 onsucelsucexmid 4273 sucprcreg 4292 0elnn 4358 acexmidlemph 5525 nntri3or 6095 swoord1 6158 swoord2 6159 addlocprlem 6725 nqprloc 6735 apreap 7687 zletric 8395 zlelttric 8396 zmulcl 8404 zdceq 8423 zdcle 8424 zdclt 8425 nn0lt2 8429 elnn1uz2 8694 mnflt 8858 mnfltpnf 8860 xrltso 8871 fzdcel 9059 fzm1 9117 qletric 9253 qlelttric 9254 qdceq 9256 nn0o1gt2 10305 |
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