Initial commit

2016-02-03 18:52:05 +00:00
commit d40505e161
507 changed files with 91383 additions and 0 deletions
@@ -0,0 +1,21 @@
+      SUBROUTINE relax(u,rhs,n)
+      INTEGER n
+      DOUBLE PRECISION rhs(n,n),u(n,n)
+      INTEGER i,ipass,isw,j,jsw
+      DOUBLE PRECISION h,h2
+      h=1.d0/(n-1)
+      h2=h*h
+      jsw=1
+      do 13 ipass=1,2
+        isw=jsw
+        do 12 j=2,n-1
+          do 11 i=isw+1,n-1,2
+            u(i,j)=0.25d0*(u(i+1,j)+u(i-1,j)+u(i,j+1)+u(i,j-1)-h2*rhs(i,
+     *j))
+11        continue
+          isw=3-isw
+12      continue
+        jsw=3-jsw
+13    continue
+      return
+      END