Lecture 9
GO TO:
Before the Lecture
- Read Sections 4.2 and 4.3. (Note: Look at the
section Outcomes to see what you are
expected to get from the reading, perhaps after also some in class
help.)
- Watch the videos related to these sections (after reading them):
- Write down all questions about the above topics to bring to our
(online) lecture. Comments about the videos are welcome!
- Work on the assigned problems for these sections.
(See Related Problems below.) You don't need
to finish them, but try to work on as many as you can and the bring
your questions to class.
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Related Problems
All of these are to be turned in on 06/19 (Homework 5) by
11:59.
Section 4.2: Turn in: 5, 8. Discuss in Meeting:
2, 3(a), 6(b).
Section 4.3: Turn in: 14, 16. Discuss in Meeting:
2, 4(a), (b), 9(a), 12, 21.
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In Class
In class:
- We will discuss the reading and pace.
- I will discuss the main points.
- I will answer questions about the sections covered.
- I will answer any other questions.
- We can work on the HW problems.
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Outcomes
After the assignment (reading and videos before class) and class,
you should:
- understand the ``there exists a unique'' quantifier,
including how to write it without using the $\exists !$
symbol;
- know how to negate a statement of the form ``$\exists ! x \;
(P(x))$'';
- know how to prove ``there exists a unique'' statement;
- understand ordered pairs and Cartesian products;
- know how to prove statements involving set operations of
Cartesian products;
- know how to find truth sets of statements in more than one
variable.
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