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Locus of center of disc tangent to the coordinate planes

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#geometry #vectors #analytic-geometry #3d
43
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Locus of center of an elliptical disc tangent to the coordinate planes

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#geometry #vectors #analytic-geometry #conic-sections #3d
114
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Why is the volume of some parallelepipeds given by the determinant?

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#linear-algebra #determinant #analytic-geometry #3d #volume
38
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Intersecting lines could have same direction cosines?

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#analytic-geometry #3d #coordinate-systems
39
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Maximizing the sum of side lengths of a circumscribed tetrahedron

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#geometry #optimization #3d #jensen-inequality
135
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Use Covariance Matrix to Convert Ellipsoid to Sphere?

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#linear-algebra #3d #covariance #spheres #ellipsoids
61
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Lie derivative and injectivity

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#differential-geometry #riemannian-geometry #smooth-manifolds #3d #lie-derivative
137
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Challenging Coordinates Calculation

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#vectors #analytic-geometry #3d
55
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What is the difference between Plane of contact of a sphere and polar plane of sphere?

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#analytic-geometry #3d #plane-geometry #spheres
139
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2D different integer valued vertices coordinates of cube projection

Published on
#geometry #3d #projective-geometry
87
Views

I need an alternative 3d rotation/translation matrix for a pygame visualization.

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#matrices #3d #rotations #quaternions #python
146
Views

Given two nonzero 3-vectors $\vec{u}$ and $\vec{v}$ of equal length, does there always exist a 3x3 matrix M such that $\vec{u}=M\vec{v}$ of this form?

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#linear-algebra #vectors #3d
43
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3D Volumes of Revolution

Published on
#calculus #integration #3d #volume #solid-of-revolution
69
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Rotation of an object in 3D

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#geometry #vectors #3d #rotations
95
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How could I check to see if a point is inside a cone projected by another point?

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#3d #convex-cone

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