12 lines
432 B
Text
12 lines
432 B
Text
Set: pp::colors
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Set: pp::unicode
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Assumed: p
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Assumed: q
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Assumed: r
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Proved: T1
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Proved: T2
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theorem T2 (H : p) (H::1 : q) : p ∧ q ∧ p := and_intro H (and_intro H::1 H)
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Proved: T3
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theorem T3 (H : p) (H::1 : p ∧ q) (H::2 : r) : q ∧ r ∧ p := and_intro (and_elimr H::1) (and_intro H::2 H)
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Proved: T4
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theorem T4 (H : p) (H::1 : p ∧ q) (H::2 : r) : q ∧ r ∧ p := and_intro (and_elimr H::1) (and_intro H::2 H)
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