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- Mathematics Stack Exchange
Q A for people studying math at any level and professionals in related fields
- Difference between ≈, ≃, and ≅ - Mathematics Stack Exchange
In mathematical notation, what are the usage differences between the various approximately-equal signs "≈", "≃", and "≅"? The Unicode standard lists all of them inside the Mathematical Operators B
- Good book for self study of a First Course in Real Analysis
Does anyone have a recommendation for a book to use for the self study of real analysis? Several years ago when I completed about half a semester of Real Analysis I, the instructor used "Introducti
- Prove that $1^3 + 2^3 + . . . + n^3 = (1+ 2 + . . . + n)^2$
This is what I've been able to do: Base case: n = 1 n = 1 L H S: 13 = 1 L H S: 1 3 = 1 R H S: (1)2 = 1 R H S: (1) 2 = 1 Therefore it's true for n = 1 n = 1 I H
- Use of and and or in Union and intersection of sets.
De Morgan laws : the negation of "P and Q" is "not-P or not-Q" Thus, when you check for the complement of a set, you have to negate the condition defining it
- Ramanujans approximation for - Mathematics Stack Exchange
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- integration of a gaussian with - Mathematics Stack Exchange
You'll need to complete a few actions and gain 15 reputation points before being able to upvote Upvoting indicates when questions and answers are useful What's reputation and how do I get it? Instead, you can save this post to reference later
- Why is the cosine of a right angle, 90 degrees, equal to zero?
Why the cosine of an angle of 90 degree is equal to zero? By definition we know that: $$\text {cos } \alpha = \frac {\text {adjacent}} {\text {hypotenuse}} $$ If we want to apply the definition to the
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