### Questions (139)

 21 A problem about floor function 18 Equation about generating functions and subfactorial 18 The equivalence between Cauchy integral and Riemann integral for bounded functions 15 Asymptotic related to the infinite product of sine 13 Book suggestions on projective geometry

### Reputation (9,115)

 +35 Is there any good book(or reference) where van Kampen's theorem is explained in details? +35 Cohomology of De Rham complex wrt different sites. +10 Asymptotic related to the infinite product of sine +10 The equivalence between Cauchy integral and Riemann integral for bounded functions

 21 Show $f$ is constant if $|f(x)-f(y)|\leq (x-y)^2$. 14 $f(x)=x^n+5x^{n-1}+3$ can't be expressed as the product of two polynomials 12 Tricky elementary integral $\int_{0}^{\frac{\pi}{2}}x\cot(x)dx$. 11 Is convex hull of a finite set of points in $\mathbb R^2$ closed? 8 How find this value $\left|\frac{z_{1}z_{2}+z_{1}z_{3}+z_{2}z_{3}}{z_{1}+z_{2}+z_{3}}\right|$

### Tags (176)

 67 real-analysis × 50 20 integration × 10 29 continuity × 5 20 geometry × 8 26 calculus × 20 17 linear-algebra × 16 24 sequences-and-series × 20 16 polynomials × 4 23 limits × 8 14 measure-theory × 13

### Bookmarks (23)

 59 Divisor -- line bundle correspondence in algebraic geometry 49 Convergence of $\sum \limits_{n=1}^{\infty}\sin(n^k)/n$ 21 Multivariate Residue Theorem? 20 A proof of Artin's linear independence of characters 17 Characterization of faithfully flat homomorphisms