# Rahul Narain

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bio website location age 28 member for 2 years, 9 months seen 14 hours ago profile views 3,198

Almost all of the questions on the front page these days are homework questions or textbook exercises. I think I'll be spending a lot less time here.

 31 will 3 lights illuminate convex solid 29 proving $\mathrm e <3$ 22 Solving the equation $x e^x = e$ 21 Is this 3D curve a circle? 20 Why is the eigenvector of a covariance matrix equal to a principal component?

# 16,920 Reputation

 +15 When can one use logarithms to multiply matrices +10 Solving the equation $x e^x = e$ +10 proving $\mathrm e <3$ +10 Applying a Math Formula in a more elegant way (maybe a recursive call would do the trick)

# 15 Questions

 24 Why does this distribution of polynomial roots resemble a collection of affine IFS fractals? 10 Is it misleading to think of rank-2 tensors as matrices? 9 Covering points on a sphere with a disk 8 Why does the polynomial equation $1 + x + x^2 + \cdots + x^n = S$ have at most two solutions in $x$? 8 Why are these two definitions of the Mandelbrot set equivalent?

# 186 Tags

 257 geometry × 104 62 inequality × 8 104 calculus × 28 58 probability × 16 94 linear-algebra × 39 53 real-analysis × 14 72 functions × 23 47 multivariable-calculus × 13 66 euclidean-geometry × 17 46 matrices × 21

# 10 Accounts

 Mathematics 16,920 rep 22358 Mathematica 1,942 rep 721 English Language & Usage 1,187 rep 313 Meta Stack Overflow 328 rep 39 TeX - LaTeX 294 rep 28
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