List questions from applications

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Prove that $f$ is closed if and only if: exist $V \subset Y$ open set such that $y \in V$ and $f^{-1}(y)\in V$.

Published on 16 Jan 2017 - 17:59

87

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Heat Loss from a 1/2 Triaxial Ellipsoid (Tortoise)

Published on 25 Mar 2026 - 22:03

97

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Where is the choice of orthogonal basis being made in the human auditory system?

Published on 25 Mar 2026 - 22:06

269

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The mathematics of Tug of War

Published on 27 Jan 2017 - 5:24

837

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Applications of non-square matrices

Published on 01 Feb 2017 - 17:46

774

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Importance of graph planarity for applications

Published on 26 Mar 2026 - 19:01

3.3k

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What Uses Does Lagrange's Interpolation See Today?

Published on 25 Mar 2026 - 16:06

418

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Are there exciting problems left in the mathematics of signal processing?

Published on 14 Feb 2017 - 16:59

315

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Accuracy and Precision Question

Published on 15 Feb 2017 - 22:47

953

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Is my solution to this trig application question right?

Published on 21 Feb 2017 - 16:17

52

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Finding extremal points on $f(x,y)$

Published on 21 Feb 2017 - 17:45

1.2k

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Chemical Conversion question (diff. equations)

Published on 23 Feb 2017 - 0:18

3.5k

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"Nice" applications of Lagrange multipliers

Published on 23 Feb 2017 - 15:02

3.7k

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Height of vertical ropes of Golden gate bridge

Published on 26 Mar 2026 - 7:59

6.3k

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Are there examples of third-(or higher)-order linear differential equations in physics or applied mathematics?

Published on 01 Mar 2017 - 17:36

List Question

Prove that $f$ is closed if and only if: exist $V \subset Y$ open set such that $y \in V$ and $f^{-1}(y)\in V$.

Heat Loss from a 1/2 Triaxial Ellipsoid (Tortoise)

Where is the choice of orthogonal basis being made in the human auditory system?

The mathematics of Tug of War

Applications of non-square matrices

Importance of graph planarity for applications

What Uses Does Lagrange's Interpolation See Today?

Are there exciting problems left in the mathematics of signal processing?

Accuracy and Precision Question

Is my solution to this trig application question right?

Finding extremal points on $f(x,y)$

Chemical Conversion question (diff. equations)

"Nice" applications of Lagrange multipliers

Height of vertical ropes of Golden gate bridge

Are there examples of third-(or higher)-order linear differential equations in physics or applied mathematics?

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