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Mirrors > Home > LLPE Home > Th. List > mdas | Structured version |
Description: ⅋ is associative. |
Ref | Expression |
---|---|
mdas | ⊦ (((𝜑 ⅋ 𝜓) ⅋ 𝜒) ⊸ (𝜑 ⅋ (𝜓 ⅋ 𝜒))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-mdas 9 | . 2 ⊦ (~ ((𝜑 ⅋ 𝜓) ⅋ 𝜒) ⅋ (𝜑 ⅋ (𝜓 ⅋ 𝜒))) | |
2 | 1 | dfli2i 66 | 1 ⊦ (((𝜑 ⅋ 𝜓) ⅋ 𝜒) ⊸ (𝜑 ⅋ (𝜓 ⅋ 𝜒))) |
Colors of variables: wff var nilad |
Syntax hints: ⅋ wmd 2 ⊸ 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: (None) |
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