Javier
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 28 How can I introduce complex numbers to precalculus students? 12 What is $\ln 0$? 11 Fourier series for $\sin x$ is zero? 10 Checking whether a polynomial of high degree is bijective or not. 8 Is it 'more rigorous' to perform definite integrations, rather than indefinite integration while solving ODEs?

### Reputation (3,838)

 +8 To show that $F$ is the antiderivative of $f$, can I write $F(x) = \int f(x) \; dx$? +5 Solving $y'' + (ax+b)y = 0$ +38 If $B$ is an ideal of $A$ then $B[x]$ is an ideal of $A[x]$ - what's wrong with my proof? +5 Intuitive understanding of integral of vector valued functions

### Questions (52)

 21 How to tell if a set of vectors spans a space? 20 Is there any meaning to an “infinite derivative”? 16 If a function has a finite limit at infinity, does that imply its derivative goes to zero? 11 Proving that $\lim\limits_{x \to 0}\frac{e^x-1}{x} = 1$ 11 Why do we think of a vector as being the same as a differential operator?

### Tags (79)

 56 calculus × 42 19 notation × 7 42 integration × 22 16 real-analysis × 5 29 algebra-precalculus × 10 15 indefinite-integrals × 4 23 analysis × 5 15 elementary-set-theory × 3 20 derivatives × 12 14 multivariable-calculus × 9

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