Find an example with an explanation of
Integral domain but not domain with factorization
Domain with factorization but not unique factorization
domains
Domain with factorization but not Noetherian domains
Unique factorization domains but not Noetherian unique
factorization domains
Noetherian Domains but not Noetherian Unique factorization
domains
Noetherian Unique factorization domains but not principal
ideal domain
principal ideal domain but not Euclidean domains
Euclidean domain but not field
a. Give an example of a finitely generated module over
an integral domain which is not isomorphic to a direct sum of
cyclic modules.
b. Let R be an integral domain and let
M=<m_1,...,m_r> be a finitely generated module. Prove that
rank of M is less than or equal to r.
Give an example of proof by construction.
For example, prove that for every well-formed formula f in
propositional logic, an equivalent WFF exists in disjunctive normal
form (DNF).
HINT: Every WFF is equivalent to a truth function, and we can
construct an equivalent WFF in full DNF for every truth function.
Explain how.
Prove that every real number with a terminating binary representation (finite number of digits to the right of the binary point) also has a terminating decimal representation (finite number of digits to the right of the decimal point).
Prove that every complete lattice has a unique maximal
element.
(ii) Give an example of an infinite chain complete poset with no
unique maximal element.
(iii) Prove that any closed interval on R ([a, b]) with the
usual order (≤) is a complete lattice (you may assume the
properties of R that you assume in Calculus class).
(iv) Say that a poset is almost chain complete if every nonempty
chain has an l.u.b. Give an example of an almost chain...