13 How many points are needed to uniquely define an ellipse? 7 Convert infinite 2D plane integer coords to 1D number 5 Calculating the square root of 2 4 Is $\tan^{-1}(-1) = 3\pi /4$ or $=7\pi /4$? I understand they're both valid solutions, but what about places where the value is added/subtracted? 4 How to integrate $\int\frac{1}{\sqrt{x(x-9)(x-5)}}\,dx$?

Reputation (1,198)

 +10 What is the maximum value of $\ln(x+\ln(x+\ln(x+\cdots)))-\ln x$? +45 Why cant I prove this trigonometric equation straight down? +15 How many points are needed to uniquely define an ellipse? +10 Is there a math expression equivalent to the conditional ternary operator?

Questions (8)

 4 Prove that a surreal number is born in a finite stage if and only if it is of the form $\frac m{2^n}$. 3 Understanding a particular method of solving generalized version of Pell's equation 2 Why should we adopt the cumulative universe convention? 2 Do type constructors have type themselves? 1 Visually suggestive way to present a finite group

Tags (93)

 13 linear-algebra × 2 8 algebraic-geometry × 2 12 conic-sections × 2 7 approximation × 2 10 calculus × 5 6 real-analysis × 5 8 integration × 5 6 recurrence-relations × 3 8 trigonometry × 4 6 prime-numbers × 2

Accounts (10)

 Mathematics 1,198 rep 22 silver badges1515 bronze badges Physics 260 rep 22 silver badges1010 bronze badges Computer Science 106 rep 55 bronze badges Quantum Computing 101 rep 11 bronze badge Mathematica 101 rep 11 bronze badge