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SUBROUTINE banmul(a,n,m1,m2,np,mp,x,b)
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INTEGER m1,m2,mp,n,np
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REAL a(np,mp),b(n),x(n)
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INTEGER i,j,k
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do 12 i=1,n
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b(i)=0.
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k=i-m1-1
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do 11 j=max(1,1-k),min(m1+m2+1,n-k)
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b(i)=b(i)+a(i,j)*x(j+k)
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11 continue
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12 continue
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return
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END
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