# Tagged Questions

**23**

votes

**3**answers

1k views

### Is “problem solving” a subject to be taught?

I am witnessing a new curriculum change in my country (Iran). It includes the change of all the mathematics textbooks at all grades. The peoples involved has sent me the textbook for seven graders (13 ...

**1**

vote

**1**answer

134 views

### First moment of a function of a normally distributed random variable

I'm trying to find the first moment of the following function:
$f(x) = \frac{(-ax+\sqrt{1-a^2})(-bx+\sqrt{1-b^2})}{\sqrt{x^2+1}}H(-ax+\sqrt{1-a^2})H(-bx+\sqrt{1-b^2})$ where $H(x)$ denotes the ...

**13**

votes

**11**answers

3k views

### Elementary mathematical books

I understand that this is a bit of offtopic but mathoverflow is my last resort, as google did not help.
I am about to publish an English translation of my Russian book for high school students. The ...