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diff --git a/sys/vops/lz/alovs.x b/sys/vops/lz/alovs.x
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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+# ALOV -- Compute the low value (minimum) of a vector.
+
+short procedure alovs (a, npix)
+
+short	a[ARB]
+int	npix
+short	low, pixval
+int	i
+
+begin
+	low = a[1]
+
+	do i = 1, npix {
+	    pixval = a[i]
+	    if (pixval < low)
+		low = pixval
+	}
+
+	return (low)
+end