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 Jan 18 answered Why does a matrix with zero eigenvalues and nonzero singular values have to be non-symmetric? Jan 16 answered Probability of urns Jan 8 answered In Wikipedia's motivating example of wedge product, what happened to $e_1 \wedge e_1$ Jan 8 asked Functions where the pre-image of convex sets is convex Jan 8 answered Basis for set of matrices with trace not equal 0 Jan 7 answered Is there a symbol for plus and minus as opposed to plus or minus? Jan 2 answered Is it possible to draw this picture without lifting the pen? Dec 21 answered Even + Odd Function Dec 21 answered Have anyone ever thought of continuous analog Turing machine? Dec 20 answered When is a mobius transformation its own inverse? Dec 19 answered List all degree one, two, three polynomials. Dec 15 answered 12 bit strings with more zeros than ones Dec 13 answered Can sets have derivatives? Dec 12 answered $f$ continuous on $(a,b)$ and $|f|$ differentiable on $(a,b)$; is $f$ differentiable in $(a,b)$? Nov 1 answered Show the following is a group $a * b=a+b+ab$ Nov 1 answered Determine the complex function $f\left ( z \right )$ Nov 1 answered measurable functions. Why defined like this? Oct 31 answered What mathematical object accepts a sequence as input? Oct 31 answered boolean equation to truth table Oct 28 answered convergent sequence / prove of reordering rule