Andrew Tomazos
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 Jan11 comment Circle intersection in radial coordinates? @leo: I specifically need the $\theta$ for the application. But actually you are right - I could solve in rectangular coordinates and then calculate theta after having the two points (x,y) coordinates. Jan11 answered Circle intersection in radial coordinates? Jan11 comment Circle intersection in radial coordinates? @Clayton: Then they would not qualify as their interiors would be disjoint. See second sentence of post. Jan11 revised Circle intersection in radial coordinates? added 13 characters in body Jan11 asked Circle intersection in radial coordinates? Jan11 accepted Two circles overlap? Jan11 comment Two circles overlap? Yes, it seems obvious now. Thank you. Jan11 asked Two circles overlap? Nov9 asked Notation for elementwise matrix binary operations? Nov8 comment Derivative of $x \over x+k$? For some embarassing reason I can't explain I thought that because the numerator and denominator shares the $a$ term the Quotient Rule didn't apply. Sorry. Nov7 accepted Derivative of $x \over x+k$? Nov7 asked Derivative of $x \over x+k$? Oct28 accepted Generously Feasible? Oct26 comment How is $dx \over dy$ different from $\partial x \over \partial y$? math.stackexchange.com/questions/221755/… Oct26 revised Geometric Interpretation of Total Derivative? edited title Oct26 asked Geometric Interpretation of Total Derivative? Oct26 comment How is $dx \over dy$ different from $\partial x \over \partial y$? Now I am really confused. If we plot in 3D a surface $x=z_1z_2$, then at a given point on the surface the tangent in the $z_1$ direction will correspond to the partial derivative $\partial x \over \partial z_1$. Does the total derivative have a similiar geometric interpretation? Oct26 comment How is $dx \over dy$ different from $\partial x \over \partial y$? But for all mechanical purposes all the same rules apply in both cases? We are asking how the "numerator" variable varies with respect to the "denomiator" variable, assuming everything else is held constant. Oct26 revised How is $dx \over dy$ different from $\partial x \over \partial y$? edited title Oct26 comment How is $dx \over dy$ different from $\partial x \over \partial y$? So what does $dx \over dz_1$ mean? Or is it undefined? If it is undefined why not just use the same notation?