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# Feng Cheng Chang

### Allwave Corporation

Last seen: 1 year ago Active since 2008

Followers: 0   Following: 0

Professor, Senior Scientist, Ph. D. in E.E., University of Alabama, IEEE Life member, Retired Professional Interests: mathematics, EM waves, Antennas

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Submitted

Simplifying the built-in function [q,r]=deconv(b,a)
Create an efficient function [q,r]=deconc_e(b,a) to eliminate the undesired data that resulted from running the existing built-i...

5 years ago | 1 download |

Submitted

Function of square matrix: fA=fsm(fx,A)
Given: f(x)= function of x, and A= square matrix. Find: f(A)=function of this matrix A.

5 years ago | 1 download |

Submitted

poly_gcd(p,q)
Find polynomial GCD by "Leading-coefficient Elinimation"

6 years ago | 1 download |

Submitted

The day of week
The day of week of any given day

8 years ago | 1 download |

Submitted

Matrix inverse and determinant
Finding inverse and determinant of matrix by order expansion and condensation

8 years ago | 4 downloads |

Submitted

mtx_d(A,D,d)
Making given matrix altered to have a certain constant for its determinant

9 years ago | 1 download |

Submitted

Complex matrix inversion by Real matrix inversion
Calculate the complex matrix inverse by using only real matrix inverse

9 years ago | 2 downloads |

Submitted

Making given matrix singular
Making the given matrix singular by adding a matrix with multiplier.

9 years ago | 1 download |

Submitted

inv_det_0(A)
Inverse and determinant of a matrix by order expansion and condensation

9 years ago | 1 download |

Submitted

Polynomials with multiple roots solved
Solving multiple roots polynomial, using simple elementary arithematic operations mostly.

10 years ago | 1 download |

Submitted

Polynomial division - derived form covolution
Polynomial division is derived directly from convolution.

11 years ago | 1 download |

Submitted

Inverse and determinant of square matrix
Inverse and determinant of a square matrix are determined using only simple matrix multiplication

11 years ago | 1 download |

Submitted

Polynomial division by convolution -- up to finite terms
Division of two polynomials by convolution to get up to K terms.

13 years ago | 1 download |

Submitted

Polynomial division by convolution - quotient and reminder
Division of two polynomials to get quotient and reminder using convolution matrix.

13 years ago | 1 download |

Submitted

Solving multiple-root polynomials
Find roots and multiplicities of given polynomials using this short compact routine.

13 years ago | 1 download |

Submitted

Multiple-root polynomial solved by partial fraction expansion
To find poles/residues of the rational function, instead of roots/multiplicities of the polynomial

15 years ago | 1 download |

Submitted

Polynomial coefficient vector derived from sub-polynomial factors
A polynomial coefficient vector is derived from several powered polynomial factors.

15 years ago | 1 download |

Submitted

Factorization of a polynomial with multiple roots
By a novel effective approach "Monic polynomial subtraction" for computing GCD polynomial.

15 years ago | 1 download |

Submitted

Exact GCD of integer polynomials
Exact GCD of a pair of polynomials is obtained by "elimination of leading polynomial coefficient"

15 years ago | 1 download |

Submitted

Factoring a multiple-root polynomial
A multiple-root polynomial is factored into lower-degree distict-root polynomials, then solved.

16 years ago | 3 downloads |