initial commit / add all books

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diff --git a/1332/CH20/EX20.7/20_7.pdf b/1332/CH20/EX20.7/20_7.pdf
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diff --git a/1332/CH20/EX20.7/20_7.sce b/1332/CH20/EX20.7/20_7.sce
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+//Example 20.7

+//Laplace Distribution

+//Page no. 694

+clc;clear;close;

+

+dr=3;r0=4;dth=%pi/4;

+deff('y=f(u1,u2,u3,u4)','y=(u1+u3+(dr*(u3-u1))/(2*r0)+(u2+u4)*(dr/(r0*dth))^2)/(2*(1+(dr/(r0*dth))^2))')         //laplace distribution

+for i=1:8

+    U(i)=0;

+end

+printf('Itr\t  U1\t  U2\t  U3\t  U4\t  U5\t  U6\t  U7\t  U8\n-----------------------------------------------------------------------')

+for l=0:15

+    printf('\n  %i',l)

+    for i=1:8

+        if i==1 then

+            u1(i)=f(100,U(8),40,U(i+1))

+        elseif i==8

+            u1(i)=f(100,U(i-1),40,U(1))

+        else

+            u1(i)=f(100,U(i-1),40,U(i+1))

+        end

+        

+    end

+    for i=1:8

+        U(i)=u1(i)

+        printf('\t%.3f',U(i))

+    end

+end
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