Math 1200: Problems, Conjectures and Proofs - Fall 2021 - Section A and C - Zabrocki




Contact information:

Mike Zabrocki
My last name ``at`` mathstat.yorku.ca
Office: DB (TEL) 2026
office hours: Monday 1-2 (online), Wednesday 3-4 in N Ross 501 (and online)



Course description:

Extended exploration of elementary problems leading to conjectures, partial solutions, revisions, and convincing reasoning, and hence to proofs. Emphasis on problem solving, reasoning, and proving. Regular participation is required. Prerequisite: 12U Advanced Functions (MHF4U) or Advanced Functions and Introductory Calculus (MCB4U). NCR note: Not open to any student who is taking or has passed a MATH course at the 3000 level or higher.

Most High School mathematics problems are solved using algorithmic methods or via reference to model solutions. One purpose of this course is to enable students to develop the confidence and ability to attack richer and more demanding problems. The attempt to check work and to explain one’s discoveries to others leads naturally to the need for explanation. Learning how to present convincing reasoning — or proof — is one of the course outcomes.

With an emphasis on communication/convincing argument, there is a critical contribution to be made by: group work, reading a proposed 'proof' including other student's work, presenting and discussing as a whole class. There is also value in working through several different approaches to solve a problem, and taking the time to understand an alternative approach offered by a peer in the class. Doing mathematics well includes talking and listening to mathematics and there will be assignments that require collaborative work with another student in the class, as well as support for forming study groups.

The main goal of this course is to develop skills that lead to understanding and communicating a convincing argument. Support will be given for proof presentation, especially for the kinds of proofs that students are expected to produce in their second year and higher level courses. This includes induction, and arguments with counting and with inequalities. Formal proof writing exercises will be introduced in the second half of the course, once problem solving and informal justification skills reach an acceptable level.




Course references:

The course textbook is available free online
Mathematical Reasoning: Writing and Proof Version 3 by Ted Sundstrom.
Other useful references are

Martin Liebeck, A Concise Introduction to Pure Mathematics, Third Edition.
John Mason, Leone Burton, Kaye Stacey, Thinking Mathematically, Second Edition. This book gives an approach to problem solving and the problem solving experience. It is also a source for rich and varied problems.
G. Polya, How to Solve It: A New Aspect of Mathematical Method.



Course components:

The evaluation will be based on the following criteria
Participation
tutorial presentation, assignments
15%
Assignments
assigned throughout the term
35%
Midterm
November 2, 2021
20%
Final Examination
during Dec exam period
30%




Schedule:

Date
Topic
Remarks
Sept 9
Introduction, LaTeX
first assignment (src) - due September 23
Sept 14
A first problem, telescoping sums
telescoping writeup
Sept 16
problem solving strategies, logic statements

Sept 21
logic
section 2.1
Sept 23
logic, divides, disprove if/then, direct proof
section 3.1
Sept 28
exists/forall, direct proofs with inequalities
section 2.4
Sept 30
division algorithm, recall of algebra
section 3.5
Oct 5
Revision list, complex numbers

Oct 7
complex numbers

Oct 12-14
Reading week

Oct 19
complex numbers, beginning of induction
section 4.1
Oct 21
induction
section 4.2
Oct 26


Oct 28


Nov 2
Midterm exam

Nov 4


Nov 9


Nov 11


Nov 16


Nov 18


Nov 23


Nov 25


Nov 30


Dec 2


Dec 7





Tutorial schedule:

Date
Topic
Remarks
Sept 14 or 16
Assignment 1 (src) and LaTeX

Sept 21 or 23
Assignment 2 (src p1 p2 due Oct 5) and logic(?)
first assignment due this week
Sept 28 or 30
Assignment 2 and logic

Oct 5 or 7
Assignment 3

Oct 12 or 14
Reading week

Oct 19 or 21


Oct 26 or 28


Nov 2 or 4


Nov 9 or 11


Nov 16 or 18


Nov 23 or 25


Nov 30 or Dec 2





Announcements:

(September 1, 2021) Welcome. Tutorials for this class will meet for the first time on in the week of September 13. Please see e-class for class material and information about this course, but the schedule of topics and important dates will be recorded here.