Problem 85. Remove the polynomials that have positive real elements of their roots.

Created by Cody Team

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The characteristic equation for a dynamic system is a polynomial whose roots indicate its behavior. If any of the roots of the polynomial have a positive real part, the behavior of the system will be divergent. Given a cell array of vectors that represent polynomials, remove the ones that have roots with positive real components.

Example:

 polyIn = {[1 1],[1 -1]}
 polyOut = {[1 1]}

since roots([1 -1]) is 1, a positive number.

Solve

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1020 Solutions
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Last Solution submitted on Jan 13, 2020

Last 200 Solutions

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2 Comments

2 Comments

Cris Luengo on 14 Jul 2012

The test set should contain a polynomial with complex roots where the real part is positive, and a polynomial with a positive and a negative root.

Hans Kramer on 31 Oct 2018

Too less test cases

Solution Comments

Solution 107869

1 Comment

1 Comment

Cris Luengo on 14 Jul 2012

This removes only polinomials if all the roots are positive. Should read 'all' instead of 'any' here.

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matlab

Problem 85. Remove the polynomials that have positive real elements of their roots.

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Last 200 Solutions

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Problem 85. Remove the polynomials that have positive real elements of their roots.

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Last 200 Solutions

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Solution Comments

Problem Recent Solvers455

Suggested Problems

More from this Author95

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