By A. David Wunsch

ISBN-10: 1498755682

ISBN-13: 9781498755689

This supplemental textual content permits teachers and scholars so as to add a MatLab content material to a fancy variables path. This publication seeks to create a bridge among services of a fancy variable and MatLab. --

summary: This supplemental textual content permits teachers and scholars so as to add a MatLab content material to a fancy variables path. This booklet seeks to create a bridge among features of a fancy variable and MatLab

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**Extra resources for A Matlab companion to complex variables**

**Example text**

Suppose you want to make contour plots in order to study some function u(x,y), but you have no idea of what constant values to choose for each contour. You can let MATLAB make the choices for you. , m), whose value is specified. 6 Contour lines for real and imag (z2). 12. 5 38 A MATLAB® Companion to Complex Variables on which u(x,y) assumes m different values of its own choosing. The value assumed on each contour by u(x,y) chosen by MATLAB can be read off each plot provided you are using the command clabel(d,h), as described above.

1 + i)24/5 b. (3 − 4i)5/7 c. (13 + 7i)100/99 (be sure to use the function zeros in this case to create the coefficients for roots) 4. 6, we can sum all the m possible values of zn/m. The result is S= ( r) m n n cis θ m m− 1 ∑ cis 2kπ k=0 n m We can show that this summation S = 0. In other words, the sum of all possible values of zn/m is zero. 20 A MATLAB® Companion to Complex Variables Recall De Moivre’s Theorem (cisϕ)k = cis(kϕ), where k is any integer and ϕ is any number. The result is in all complex variables texts.

6. 5, we can now see the contour plots on which Re(z2) assumes constant values. Notice that these curves have right angle intersections with those on which Im(z2) assumes constant values. * Recall that this orthogonal property need not hold at a point where f′(z) = 0, and indeed, the intersections are not orthogonal at the origin in the above. Here f′(z) = 2z is indeed zero. Suppose you want to make contour plots in order to study some function u(x,y), but you have no idea of what constant values to choose for each contour.

### A Matlab companion to complex variables by A. David Wunsch

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