mixedmath
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### Answers (1,572)

 121 Why is the inverse of a sum of matrices not the sum of their inverses? 68 Is it unheard of to say that you like math but hate proofs? 59 Why is it hard to prove whether $\pi+e$ is an irrational number? 58 How is $e^x$ read aloud? 50 How many circles are needed to cover a rectangle?

### Reputation (58,640)

 +115 Field with $125$ elements +10 What are the numbers before and after the decimal point referred to in mathematics? +45 If $p$ and $q$ are odd, prove that there are no integral solutions +10 Definition of square root symbol - $\sqrt{x^2}=?$

### Questions (29)

 18 Using the Brun Sieve to show very weak approximation to twin prime conjecture 15 Is there a 'far' irrational number? 15 closed form of $\sum \frac{1}{z^3 - n^3}$ 14 Prove $\frac{16}{27} \left( \frac a{b+c} + \frac b{a+c} +\frac c{a+b} \right) ^3 + \left( \frac{abc}{(a+b)(b+c)(a+c)}\right)^{1/3} \geq \frac52$ 11 Classifying Unital Commutative Rings of Order $p^2$

### Tags (354)

 742 calculus × 272 310 linear-algebra × 83 592 number-theory × 180 297 soft-question × 33 430 elementary-number-theory × 139 266 prime-numbers × 53 365 real-analysis × 150 259 integration × 95 364 sequences-and-series × 118 235 abstract-algebra × 82

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 Enlightened × 33 Yearling × 5 Nice Answer × 82 Copy Editor Good Answer × 15 complex-analysis Revival × 32 elementary-number-theory Guru × 3 Announcer × 4

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