Initial commit

2016-02-03 18:52:05 +00:00
commit d40505e161
507 changed files with 91383 additions and 0 deletions
@@ -0,0 +1,26 @@
+      SUBROUTINE gser(gamser,a,x,gln)
+      INTEGER ITMAX
+      REAL a,gamser,gln,x,EPS
+      PARAMETER (ITMAX=100,EPS=3.e-7)
+CU    USES gammln
+      INTEGER n
+      REAL ap,del,sum,gammln
+      gln=gammln(a)
+      if(x.le.0.)then
+        if(x.lt.0.)pause 'x < 0 in gser'
+        gamser=0.
+        return
+      endif
+      ap=a
+      sum=1./a
+      del=sum
+      do 11 n=1,ITMAX
+        ap=ap+1.
+        del=del*x/ap
+        sum=sum+del
+        if(abs(del).lt.abs(sum)*EPS)goto 1
+11    continue
+      pause 'a too large, ITMAX too small in gser'
+1     gamser=sum*exp(-x+a*log(x)-gln)
+      return
+      END