**
Math 346 SPRING 2010, List of lectures
**

On this page I will post content of all lectures with reference to the
book. All handouts also will be posted here.
Monday, March 29: Overview. Chapter 0.
Wednesday, March 31: The Greatest Common Divisor and Least Common Multiple.
Section 1.1.
Here is homework!
Friday, April 2: The Division Algorithm. The Euclidean Algorithm.
Sections 1.2-1.3.
Monday, April 5: Linear combinations. Section 1.4. We will have QUIZ on
Friday!!!
Wednesday, April 7: More on linear combinations. Section 1.4.
Here is homework!
Friday, April 9: Congruences. Section 1.5.
Monday, April 12: Mathematical Induction. Section 1.6.
Wednesday, April 14: Strong Principle of Induction. Primes and
composite numbers. Why uniqueness of prime decomposition is not obvious.
Sections 2.1-2.2. New homework!
Friday, April 16: The Fundamental Theorem of Arithmetic.
Sections 2.2-2.4.
Monday, April 19: The digit theorem. Any composite number has a divisor
less than its square root. The set of primes is infinite. Sections 2.4-2.5.
We will have QUIZ on Friday!!!
Wednesday, April 21: A formula for the number of divisors. The sum of
divisors. Perfect numbers. Sections 2.6-3.1, 3.3.
New homework!
Friday, April 23: Mersenne primes and Fermat primes. Section 3.4.
Monday, April 26: Multiplicative functions. Euler phi function.
Sections 3.2, 3.5.
Wednesday, April 28: Solving congruences. Linear congruences.
Section 4.1. New homework!
Friday, April 30: More on linear congruences. Section 4.1.
Monday, May 3: The Chinese Remainders Theorem. Section 4.2.
We will have MIDTERM on Friday!!!
Wednesday, May 5: Euler and Fermat theorem. Section 4.3.
Please find here practice problems for midterm.
Here are the answers.
New homework!
Friday, May 7: MIDTERM.
Monday, May 10: Orders of a modulo b. Wilson Theorem. Section 4.3.
Wednesday, May 12: Primality testing. Section 4.4.
New homework!
Friday, May 14: RSA. Section 4.5.
Monday, May 17: Higher degree congruences. Section 5.1. We will have
QUIZ (covering Chapter 4) on Wednesday!!!
Wednesday, May 19: Congruences with Prime Power Moduli. Section 5.2.
New homework!
Friday, May 21: Quadratic Residues. Section 5.3.
Monday, May 24: Euler criterion for quadratic residues. Legendre symbol.
Gauss Lemma. Sections 5.3-5.4. We will have QUIZ (covering Sections 5.1-5.3)
on Wednesday!!!
Wednesday, May 26: Computation of the Legendre symbol (2/p). Section 5.4.
Last homework (due next Friday)!
Friday, May 28: The Legendre symbol (3/p). The Pepin test. Sections 5.4
and 4.4.
Wednesday, June 2: The quadratic reciprocity. Sections 5.4-5.5.
Please find here practice problems for
the final. We will have QUIZ on Friday!!!
Friday, June 4: Sums of squares. Sections 7.2-7.3.
Please find here the answers for the
practice problems.
END