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  • Solving a system of ordinary differential equations with complex roots
    Solving a system of ordinary differential equations with complex roots Ask Question Asked 6 years, 5 months ago Modified 6 years, 3 months ago
  • What is a meaning of a complex roots? - Mathematics Stack Exchange
    0 In the simplest sense, what does a complex root on the complex plane actually mean? For polynomial equations a root is a x-coordinate of where the curve crosses the x-axis I just find it strange how the roots of complex numbers are symmetrical about the origin of the complex plane, yet no such symmetry exists for polynomial roots
  • Complex roots of real polynomials and real roots of their derivatives
    Applied to quartic equations with two sets of complex conjugate roots, the theorem implies that in general the roots of the quartic are at the vertices of a quadrilateral in the complex plane and the roots of the derivative (real and otherwise) lie inside this quadrilateral
  • Graphically solving for complex roots -- how to visualize?
    We can present complex roots to equation on the "complex plane" with one axis for the real part and the other for the imaginary part You can play with, for instance, WolframAlpha, to give it a polynomial equation to solve and get a display of the complex roots If you look up "DeMoivre's Theorem" online, you will find something interesting about the roots of equations $ \ z^n \ = \ c
  • Is there an intuitive way of visualising complex roots?
    The axis of symmetry is the real part of the complex roots; the imaginary part can be found by subtracting the square of the axis (here, $4$) from the intercept ($13-4=9$) and then taking the square root ($3$) This assumes the roots come in conjugate pairs (so the coefficients of your quadratic are real numbers)
  • Why cant a polynomial of degree $n$ have less than $n$ (complex) roots . . .
    Regardless, once you know any non-constant complex polynomial has at least one root, the proof that the number of roots is exactly the degree follows, for instance, by induction on the degree
  • complex analysis - Significance of Roots of Unity - Mathematics Stack . . .
    I've taken college courses where I need the roots of unity in quantum mechanics as solutions to exponential equations involving spin precession, and they are useful for deriving properties in signal processing like Butterworth filters and (if I recall correctly) properties of the Fourier transform (or similar complex exponentials)
  • complex numbers - What is $\sqrt {i}$? - Mathematics Stack Exchange
    The square root of i is (1 + i) sqrt (2) [Try it out my multiplying it by itself ] It has no special notation beyond other complex numbers; in my discipline, at least, it comes up about half as often as the square root of 2 does --- that is, it isn't rare, but it arises only because of our prejudice for things which can be expressed using small integers
  • How to do partial fraction decomposition with complex roots?
    How to do partial fraction decomposition with complex roots? Ask Question Asked 7 years, 2 months ago Modified 7 years, 2 months ago
  • Explaining the nature of complex roots of a quartic
    Thank you for this I think I will start by demonstrating the distributive and commutative properties of the complex conjugate, then using those to state that if a complex numbers is a root of a polynomial, so is its conjugate, and therefore complex roots must come in conjugate pairs Then I can just list the cases for each order polynomial





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