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age 29
visits member for 3 years, 8 months
seen 14 mins ago

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.

I hereby authorize whoever it may concern to post my comments as answers if they wish, whether as community wiki or otherwise if you like imaginary internet points.


Sep
1
revised Groups of real numbers
added link to previous question
Aug
31
revised What is the connection between linear algebra and geometry?
edited title
Aug
26
revised Bounds on off-diagonal entries of a correlation matrix
elaborated title
Aug
26
revised Equation manipulation question
added line break to last equation
Aug
24
revised Angle between lines joining tetrahedron center to vertices
made title more informative
Aug
23
revised Complex number + trigo : $-1 + \tan(3)i$ , find modulus and argument
copyedited, TeXed
Aug
21
revised maximization over a simplex
display-math
Aug
17
revised About this limit, $\lim_{t\to0^+} \sum_{n=1}^\infty \frac{\sqrt t}{1 + tn^2}$
added the limit in question
Aug
16
revised How tall would a tower at the South Pole have to be for the top to get year-around sunshine?
fixed formatting; SI units should be in roman type
Aug
9
revised About positive-definiteness of a matrix Q depending on matrices H and P
retagged, TeXed
Jul
22
revised Solving quadratic vector equation
you missed one; also minor typos
Jul
22
revised How to find the center of an ellipse?
TeXed
Jul
21
revised Need line generalization method like Dougles Peuker, that is able to keep turning points along closed polygon boundaries (for 2d or 3d point data)
removed irrelevant tags
Jul
21
revised On sorting in an array-less language
deleted 16 characters in body
Jul
18
revised How to solve this equation with two square root terms?
edited title
Jul
5
revised NP verifier-based definition
edited tags
Jun
30
revised Is there such a thing as the “edge-face dual” of a polyhedron, and is the “edge-face dual” of a cube a rhombic dodecahedron?
added 508 characters in body
Jun
23
revised How do I calculate a dihedral angle given Cartesian coordinates?
rationale for atan2
Jun
21
revised a property of log determinant
formatted math
Jun
21
revised What's the minimum of $\int_0^1 f(x)^2 \: dx$, subject to $\int_0^1 f(x) \: dx = 0, \int_0^1 x f(x) \: dx = 1$?
mixed up the notation for the functional and the integrand