Table of Contents
1: Why Is Negative Number Multiplied by Negative Number Plus? |
Just a definition by a mathematician? But there should be some good reasons for adopting the definition. |
2: Why Are Mirror Images Regarded to Be Congruent in Plane Geometry? |
Just a definition by a mathematician? But there should be some good reasons for adopting the definition. |
3: What Are Discrete? What Are Continuous? |
Water is not continuous, because it is made of molecules. Even if we ignore the fact, "Water is continuous." is mathematically nonsense. |
4: Are You Talking About Sets or About Collections? |
Japanese schools talk about "shugo"s, but are they sets or collections? |
5: What Is a Vector? |
"A quantity that has both size and direction"? But what is 'size' or 'direction'? In fact, any vector is an element of a vectors space, which is not any tautology. |
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