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CSImpCS
⊢
f
⊃
g
⇒ ⊢
f
∗
⊃
g
∗
CSImpCS
Proof:
1
⊢
f
⊃
g
given
2
⊢
f
+
⊃
g
+
1
,
ChopPlusImpChopPlus
3
⊢
empty
∨
f
+
⊃
empty
∨
g
+
2
,
Prop
4
⊢
f
∗
⊃
g
∗
3
,
def. of
∗
qed
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2024-08-03
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