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Mirrors > Home > LLPE Home > Th. List > mdm2s | Structured version |
Description: Par is monotone in its second argument. Syllogism form of mdm2 69. |
Ref | Expression |
---|---|
mdm2s.1 | ⊦ (𝜓 ⊸ 𝜒) |
Ref | Expression |
---|---|
mdm2s | ⊦ ((𝜑 ⅋ 𝜓) ⊸ (𝜑 ⅋ 𝜒)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-init 7 | . . 3 ⊦ (~ (𝜑 ⅋ 𝜓) ⅋ (𝜑 ⅋ 𝜓)) | |
2 | mdm2s.1 | . . 3 ⊦ (𝜓 ⊸ 𝜒) | |
3 | 1, 2 | mdm2 69 | . 2 ⊦ (~ (𝜑 ⅋ 𝜓) ⅋ (𝜑 ⅋ 𝜒)) |
4 | 3 | dfli2i 66 | 1 ⊦ ((𝜑 ⅋ 𝜓) ⊸ (𝜑 ⅋ 𝜒)) |
Colors of variables: wff var nilad |
Syntax hints: ⅋ wmd 2 ~ wneg 3 ⊸ wli 61 |
This theorem was proved from axioms: ax-ibot 4 ax-ebot 5 ax-cut 6 ax-init 7 ax-mdco 8 ax-mdas 9 ax-eac1 33 ax-eac2 34 |
This theorem depends on definitions: df-lb 56 df-li 62 |
This theorem is referenced by: licon 94 |
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