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Contents

  1. Inf1: Computation and Logic Homepage
  2. Learning Reason Introduction Logic Sets by Nancy Rodgers
  3. Set theory
  4. Reader Interactions
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Permissions Request permission to reuse content from this site. Symbolic Language. Two Quantifiers. Five Logical Operators. Laws of Logic.

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Inf1: Computation and Logic Homepage

Logic Circuits. Proofs and Arguments. Proving Implications. Writing a Proof. Working with Quantifiers. Using Cases. Proof by Contradiction. This results set has either the same columns as base tables or column from both tables implied in join operation. The execution plan for this particular query does not represent the equivalent operator in SQL Server database engine.

To do this, we will take table Person. Person as set A and Person. PersonPhone table as set B. This gives us following statement:. Actually, this operation is very useful in a wealth of situations and we will use it extensively in last article of this series. Now we know how to write a query using a cross join or Cartesian product, well, we should know in which cases we could use it.

With the example above, you can imagine a solution with a list of first names and a list of last names. When performing a cross join on both, we would get candidates for a Contact or a Person table. This can also be extended to addresses and any kinds of data. Your imagination is the limit.

We will just present the situation. So, we cannot plot a chart directly and we have to first generate a timeline with the appropriate step here hours. The puzzler initially feels the tension that comes from not knowing how to start just as the mathematician feels when first investigating a topic or trying to solve a problem. Similarly, the puzzler "plays" with the puzzle. Sometimes the conjectures turn out to be provable, but often they do not, and the mathematician goes back to playing.


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At some stage, the puzzler mathematician develops sufficient sense of the structure and only then can he begin to build the solution prove the theorem. This multi-step process is perfectly mirrored in solving the KenKen problems this course presents. Some aspects of the solutions motivate ideas you will encounter later in the course. For example, modular congruence is a standard topic in number theory, and it is also useful in solving some KenKen problems. Another reason for including puzzles is to foster creativity.

First, read the course syllabus. Then, enroll in the course by clicking "Enroll me in this course". Click Unit 1 to read its introduction and learning outcomes.

Learning Reason Introduction Logic Sets by Nancy Rodgers

You will then see the learning materials and instructions on how to use them. In this unit, you will begin by considering various puzzles, including Ken-Ken and Sudoku. You will learn the importance of tenacity in approaching mathematical problems including puzzles and brain teasers. You will also learn why giving names to mathematical ideas will enable you to think more effectively about concepts that are built upon several ideas. Then, you will learn that propositions are English sentences whose truth value can be established.

You will see examples of self-referencing sentences which are not propositions. You will learn how to combine propositions to build compound ones and then how to determine the truth value of a compound proposition in terms of its component propositions. Then, you will learn about predicates, which are functions from a collection of objects to a collection of propositions, and how to quantify predicates. Finally, you will study several methods of proof including proof by contradiction, proof by complete enumeration, etc.


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  • Introduction;

In this unit, you will explore the ideas of what is called 'naive set theory. You should mainly be concerned with how two or more given sets can be combined to build other sets and how the number of members i. This unit is primarily concerned with the set of natural numbers. The axiomatic approach to will be postponed until the unit on recursion and mathematical induction.

Set theory

This unit will help you understand the multiplicative and additive structure of. This unit begins with integer representation: place value. This fundamental idea enables you to completely understand the algorithms we learned in elementary school for addition, subtraction, multiplication, and division of multi-digit integers.

An Introduction to Logic and Reasoning Skills (Part 1)

The beautiful idea in the Fusing Dots paper will enable you to develop a much deeper understanding of the representation of integers and other real numbers. Then, you will learn about the multiplicative building blocks, the prime numbers. The Fundamental Theorem of Arithmetic guarantees that every positive integer greater than 1 is a prime number or can be written as a product of prime numbers in essentially one way.

The Division Algorithm enables you to associate with each ordered pair of non-zero integers - a unique pair of integers - the quotient and the remainder.

Reader Interactions

Another important topic is modular arithmetic. This arithmetic comes from an understanding of how remainders combine with one another under the operations of addition and multiplication. Finally, the unit discusses the Euclidean Algorithm, which provides a method for solving certain equations over the integers. Such equations with integer solutions are sometimes called Diophantine Equations. In this unit, you will learn to prove some basic properties of rational numbers. For example, the set of rational numbers is dense in the set of real numbers. That means that strictly between any two real numbers, you can always find a rational number.