54 What exactly is calculus? 30 Repeated Roots of Polynomials Whose Coefficients are Either 0 or 1 18 Why is Zero not composite? 18 The sum of consecutive integers is $50$. How many integers are there? 17 What is the secret of number '2520'?

### Reputation (25,406)

 +10 How to check Diophantine equation modulo prime divisors +10 Solving Systems of Congruence using CRT +25 equation of tangent line passing through intersection of two level surfaces +10 Triple eigenvalue with two corresponding eigenvectors

### Questions (9)

 10 Line through the origin mod $1$ visits every sub-cube in $\mathbb{R}^n$. 6 Problem of Mary Somerville and Hypatia 6 Number of ways to form a partition from another. 5 Rational approximation using only odd numerators. 2 Derivatives of integrals that break the fundamental theorem.

### Tags (301)

 499 calculus × 313 117 ordinary-differential-equations × 98 308 algebra-precalculus × 198 106 number-theory × 71 286 elementary-number-theory × 176 104 real-analysis × 65 190 integration × 117 88 trigonometry × 49 121 sequences-and-series × 55 83 limits × 51

### Bookmarks (5)

 38 Is sum of digits of $3^{1000}$ divisible by $7$? 19 How did people get the inspiration for the sums of cubes formula? 1 An problem of irrational number approximation by rationals 1 What does inflection points of a function tell us about the integral of the function? 0 Inequality $\sqrt{n}+\sqrt{n+1}<\sqrt{x}+\sqrt{y}<\sqrt{4n+2}.$ [closed]