Let T be the set of all sequences {an} of elements of Z. Prove the following. (i) T is an integral domain with respect to addition and multiplication defined by, for all {an),{bn} in T, {an}+{bn}={an+bn} {an}.{bn}=Cn (usual multiplcation for two polynomials in polynomial rings (ii)T0={{ai}|ai=0 for all but a finite number of indices}is a subring with identity (poynomials with some k as the highest degree) (iii) The element (1,1,0,0 .....)is a unit in T but not in T0. (iv) (2,3,1,0,0 )is irreducible in T but not in T0.
Let T be the set of all sequences {an} of elements of Z. Prove the following. (i) T is an integral domain with respect to addition and multiplication defined by, for all {an),{bn} in T, {an}+{bn}={an+bn} {an}.{bn}=Cn (usual multiplcation for two polynomials in polynomial rings (ii)T0={{ai}|ai=0 for all but a finite number of indices}is a subring with identity (poynomials with some k as the highest degree) (iii) The element (1,1,0,0 .....)is a unit in T but not in T0. (iv) (2,3,1,0,0 )is irreducible in T but not in T0.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Let T be the set of all sequences {an} of elements of Z. Prove the following.
(i) T is an
{an}+{bn}={an+bn}
{an}.{bn}=Cn (usual multiplcation for two polynomials in polynomial rings
(ii)T0={{ai}|ai=0 for all but a finite number of indices}is a subring with identity (poynomials with some k as the highest degree)
(iii) The element (1,1,0,0 .....)is a unit in T but not in T0.
(iv) (2,3,1,0,0 )is irreducible in T but not in T0.
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