Math 40520 Theory of Numbers (Fall 2022)
Undergraduate number theory
Date | Lecture | Topics | |
Wed 08/24 | 1 | Integers in other bases | |
Fri 08/26 | 2 | Digits in other bases, Fibonacci sequence | |
Mon 08/29 | 3 | Prime numbers 1.2.1, unique factorization 1.1.20, Bezout | |
Wed 08/31 | 4 | Bezout's formula via linear algebra | |
Fri 09/02 | 5 | Linear equations | |
Mon 09/05 | 6 | Gcd, lcm, unique factorization | |
Wed 09/07 | 7 | Modular arithmetic 2.1 and 2.3.2, Solving diophantine equations using congruences | |
Fri 09/09 | 8 | Divisibility criteria, Exponentiation 2.3.2 | |
Mon 09/12 | 9 | Invertible mod n 2.1.13, Chinese Remainder Theorem 2.2.2 | |
Wed 09/14 | 10 | Chinese Remainder Theorem 2.2.2, Explicit CRT 2.2.3 | |
Fri 09/16 | 11 | Euler function 2.2.1, Fermat's little theorem, Euler's theorem 2.1.2, exponentials with Euler and CRT | |
Mon 09/19 | 12 | Multiplicative orders, fractions in base b, primitive roots mod p 2.5 | |
Wed 09/21 | 13 | Wilson's theorem and setup for the proof of the existence of primitive roots mod p | |
Fri 09/23 | 14 | Counting primitive roots mod p | |
Mon 09/26 | 15 | Quadratic residues, Legendre symbol | |
Wed 09/28 | 16 | CRT example, solving monomial equations mod primes | |
Fri 09/30 | 17 | Solving monomial equations mod primes and discrete logarithm | |
Mon 10/03 | 18 | Square roots mod primes, Gauss' lemma | Mod 1601 Notes |
Wed 10/05 | 19 | Gauss' lemma, quadratic reciprocity | |
Fri 10/07 | 20 | Applications of quadratic reciprocity | |
Mon 10/10 | 21 | Valuations, factorials | |
Wed 10/12 | 22 | Valuations of factorials and of binomial coefficients | |
Fri 10/14 | 23 | Valuations of binomial coefficients, counting primes | |
Mon 10/24 | 24 | Lucas' Theorem on binomials mod p | |
Wed 10/26 | 25 | Asymptotics of integer functions and the Prime Number Theorem | |
Fri 10/28 | 26 | Asymptotics of integer functions and the Prime Number Theorem | |
Mon 10/31 | 27 | Lifting the exponent, Fibonacci | |
Wed 11/02 | 28 | Primitive roots mod prime powers | |
Fri 11/04 | 29 | Continued fractions intro | |
Mon 11/07 | 30 | Continued fractions and Mobius transformations | |
Wed 11/09 | 31 | Continued fractions convergence | |
Fri 11/11 | 32 | Continued fractions and rational approximations | |
Mon 11/14 | 33 | Continued fractions recognizing rationals | |
Wed 11/16 | 34 | Continued fractions and quadratics | |
Fri 11/18 | 35 | Hensel's Lemma | |
Mon 11/21 | 36 | Hensel's Lemma examples | |
Mon 11/28 | 37 | Hasse-Minkowski and rational points on conics | |
Wed 11/30 | 38 | The Riemann zeta function | |
Fri 12/02 | 39 | Dirichlet density and the Riemann zeta function, primes in arithmetic progressions | Proportion of integers that start with 1 |
Mon 12/05 | 40 | Primality testing | |
Wed 12/07 | 41 | Probabilistic models for primes |
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