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 Sep 16 comment Help with grouping terms (maple) Thank you so much! Sep 16 accepted Help with grouping terms (maple) Sep 16 asked Help with grouping terms (maple) Dec 25 accepted Can fourier transform of a function with not empty support be zero on whole range? Dec 25 asked Can fourier transform of a function with not empty support be zero on whole range? Nov 10 awarded Supporter Nov 7 awarded Scholar Nov 7 accepted SPPS for Sturm-Liouville problems proof (Weierstrass M-test) Nov 7 answered SPPS for Sturm-Liouville problems proof (Weierstrass M-test) Nov 5 awarded Teacher Nov 5 answered 3D graphic in vector format Nov 5 comment Foci of Ellipse - given: Width and Height If ellipse and rectangle have four contact points: translate and maybe rotate an ellipse to situate its center in $(0,0)$, and then $a = p / 2$, $b = s / 2$ (or vice versa). If you need positions of foci as vectors, make inverse translation and rotation. If there are less than four contact points, there are infinity of solutions. Nov 5 comment Foci of Ellipse - given: Width and Height Excuse me, what are the wigth and the height then? Nov 5 awarded Editor Nov 5 awarded Student Nov 5 revised SPPS for Sturm-Liouville problems proof (Weierstrass M-test) added 1 characters in body Nov 5 answered Foci of Ellipse - given: Width and Height Nov 5 asked SPPS for Sturm-Liouville problems proof (Weierstrass M-test)