Rod Carvalho
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 Sep 22 revised How to divide currency? added 1 characters in body Sep 22 answered How to divide currency? Sep 22 comment How to divide currency? The word "optimal" only makes sense if there is a cost function to be minimized, or an utility function to be maximized. You gave us neither cost nor utility. Sep 22 comment Show that for vectors $\bf u$ and $\bf v$ in $ℝ^3$, $\bf u \times v = (-v) \times u$ @celtschk: If you make a typo when implementing the "trivial component-wise formula", you do not notice it. If you write said formula in terms of traces of matrices, you notice the typo because the $Q_i$ matrices won't be skew-symmetric anymore. Conceptually speaking, my approach is much more beautiful than the ugly ones based on determinants, since it comes with "error-correction" capabilities. Moreover, matrix multiplication and the trace function are more efficient and easier to implement than stupid determinants. Sep 22 revised Prove a relation of arguments of 3 complex numbers with equal modulus Fixed LaTeX Sep 22 comment Show that for vectors $\bf u$ and $\bf v$ in $ℝ^3$, $\bf u \times v = (-v) \times u$ @celtschk: Because 1) I want to. 2) it makes it easier to implement in MATLAB for example. 3) I hate determinants. Sep 22 suggested approved edit on Prove a relation of arguments of 3 complex numbers with equal modulus Sep 22 comment Show that for vectors $\bf u$ and $\bf v$ in $ℝ^3$, $\bf u \times v = (-v) \times u$ @celtschk: Yeah, but I wanted to write the cross product in terms of the trace. Sep 22 revised Show that for vectors $\bf u$ and $\bf v$ in $ℝ^3$, $\bf u \times v = (-v) \times u$ added 116 characters in body Sep 22 answered Show that for vectors $\bf u$ and $\bf v$ in $ℝ^3$, $\bf u \times v = (-v) \times u$ Sep 22 revised Basic algebra. Please help. added latex Sep 22 answered Basic algebra. Please help. Sep 22 suggested approved edit on Basic algebra. Please help. Sep 22 revised Applications of logic in sciences Added update Sep 22 revised Applications of logic in sciences added passage Sep 22 answered Applications of logic in sciences Sep 22 comment Can we make such matlab code so that every time we run the program it will return the same randomly generated matrices? @srijan: Then create a random matrix, store it, and every time you need the same "random" matrix use the stored one. What you want, apparently, is not a random matrix, but an arbitrary matrix for testing purposes. Sep 22 comment Can we make such matlab code so that every time we run the program it will return the same randomly generated matrices? @srijan: Same matrix, or same matrices? Sep 22 revised Is the product of elementary matrices an elementary matrix? added latex Sep 22 suggested approved edit on Is the product of elementary matrices an elementary matrix?