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Consider A, B, and C three points of the plan. Show that det(AB, AC) = det(BC, BA) = det (CA, CB)

a) Using a geometrical approach

b) Using the property of antisymmetry of the determinant



Find an Dedekind finite ring that is not IC (other than examples 5.10 & 5.12 given in K.R. Goodearl - Von Neumann Regular Rings)


Prove that subring of Noetherian Ring need not be noetherian.

Prove or disprove: If G is a finite group and some element of G has order equal

to the size of G, then G is cyclic.


If dim V < infinity and T is a linear transformation such that for all v belongs to V , there exist a positive integer k such that(T)^k(v) =0, then prove that T is nilpotent.
If N is nil ideal of a ring R and A is ideal of R such that A contained in N then prove that A and N/A are also nil ideal
Let G be a nonabelian group of order 10 having golden ratio 1+√5 2 as the neutral element. Then:


(a) Verify class equation for G.


(b) Find all elements of Inn(G).


(c) Verify that G/Z(G) ∼ = Inn(G).


(d) For some elements x,y,z ∈ G: verify the commutator identity: [xy,z] = [x,z][x,z,y][y,z]
Let G be the set of positive real numbers except 1. Define α∗β = αlnβ. Then:

(a) show that (G,∗) is a group.

(b) Is G abelian? if not, find its center.

(c) Give an automorphism of G.

Let G be a nonabelian group of order 10 having golden ratio 1+√

5

2

as the neutral

element. Then:

(a) Verify class equation for G.

(b) Find all elements of Inn(G).

(c) Verify that G/Z(G) ∼= Inn(G).

(d) For some elements x, y, z ∈ G: verify the commutator identity: [xy, z] = [x, z][x, z, y][y, z]


Let G be a nonabelian group of order 10 having golden ratio 1+√ 5 2 as the neutral element. Then: (a) Verify class equation for G. (b) Find all elements of Inn(G). (c) Verify that G/Z(G) ∼= Inn(G). (d) For some elements x, y, z ∈ G: verify the commutator identity: [xy, z] = [x, z][x, z, y][y, z]


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