Introduces a formula into the succedent of a sequent.
Introduces a formula into the succedent of a sequent. This method merely returns an extended sequent, not a proof.
The sequent whose succedent is to be weakened.
The formula to introduce into s1.
The sequent s1, with the succedent extended by f.
Introduces a formula into the succedent of a sequent. The rule: (rest of s1) sL |- sR ------------- (WeakeningRight) sL |- sR, f
Introduces a formula into the succedent of a sequent. The rule: (rest of s1) sL |- sR ------------- (WeakeningRight) sL |- sR, f
The top proof with (sL |- sR) as the bottommost sequent.
The formula to introduce below s1.
An LKProof ending with the new inference.