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Let R be any ring whose additive group is torsion-free. Show (without using Amitsur’s Theorem) that J = rad R[t] <> 0 implies that R ∩ J <> 0.
Suppose R is a simple ring which has a minimal left ideal. Then soc(RR) <> 0 and so soc(RR) = R. This means that RR is a semisimple module, so R is a semisimple ring.
Give a proof for the fact that if R is a simple ring which has a minimal left ideal, then R is a semisimple ring.
Show that for any ring R, soc(R) (= sum of all minimal left ideals of R) is an ideal of R.
Let R be a ring possibly without an identity. Show that a left identity for R need not be a right identity.
Let p be a fixed prime. Show that any ring (with identity) of order p^2 is commutative.
Test teste s
Test question_test
Given the demand function Pd=25- 2Q and the supply function Ps= 2Q+1.Asssuming
pure competition, find the consumers’ surplus, producers’ surplus and interpret the total
of consumers’ surplus and producers’ surplus
What is the equation for (6,1)
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