initial commit / add all books

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diff --git a/1332/CH15/EX15.23/15_23.pdf b/1332/CH15/EX15.23/15_23.pdf
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diff --git a/1332/CH15/EX15.23/15_23.sce b/1332/CH15/EX15.23/15_23.sce
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+//Example 15.23

+//Milne Simpson Predictor Corrector Method

+//Page no. 544

+clc;clear;close;

+deff('y=f(x,y)','y=y+exp(x)')

+h=0.5;

+y=[1,1.824,3.718,7.722]

+for i=1:4

+    x=(i-1)*h;

+    f1(i)=f(x,y(i));

+    printf('\nf%i = %g',i-1,f1(i))

+end

+y41=y(1)+4*h*(2*f1(4)-f1(3)+2*f1(2))/3

+f4=f(x+h,y41);

+y4=y(3)+h*(f4+4*f1(4)+f1(3))/3

+printf('\n\n\nPredictor = %.9f\n\n',y41)

+printf('Evaluator = %.9f\n\n',f4)

+printf('Corrector = %.9f',y4)
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