Updates made to Mcalcdos.exe

• after many inquiries for some help information and additional documentation, I wrote a help file, which is included in the download file.
• power function bug has been fixed.
• accessor function has been added (@)
• attempted to reduce the occurence of insignificnat values when zero is expected, in particular for matrix multiplication. (ie. a * inverse a)
• fixed the deriv function

• help function
• rewrote rootfinder function (now called roots) to allow for complex polynomials
• charpoly function - highly recursive (n^2*n!) so an error is returned for matrices larger than 7x7
• companion matrix of a polynomial
• eigenval of complex matrices actually returns the roots of the characteristic polynomial, so the 7x7 limit applies (for now)
• essentially, after this update users should be able to see and appreciate the relationship between the eigenvalues of a matrix and the roots of the characteristic polynomial, and vice-versa.

November 8, 2002

• Original posting of program