Question: Special Notation: -, A, V, -, , E. (), {, }+ Proving Sequents. Prove the following sequents. Please remember that a sequent is proven when

Special Notation: -, A, V, -, , E. (), {, }+ Proving Sequents. Prove the following sequents. Please remember that a sequent is proven when the conclusion appears on a line, and the dependence set of that line refers only to lines whose formulas are on the left side of the single turnstile. 5 points each 1. (PA(AAD) ) + (DA(PAA)) 2. AF ((AV -B)A(A VB))- 3. (D - (D - -D)), DI-D- 4. ((--BAD) - E), D, BI -EX 5. -A, (B-A) I-B- 6. ( E - F) I (-E - -F) 7. - FI(F - (FA -F) )

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