Remove totative ratio from factors API

This value can easily be calculated as φ(r)/r.  There is no need to have
this now that I have a function φ(r) (renamed to its mathematical name,
Totient).

I removed totative ratio instead of totient because, while it is more
important, totient is an integer while totative ratio is a float.  This
means that the totative ratio can be calculated exactly from the
totient, but not the other way round.

1 files changed, 2 insertions, 12 deletions

diff --git a/factors/totative.go b/factors/totative.go
index 7a4bebe..680cc26 100644
--- a/factors/totative.go
+++ b/factors/totative.go
@@ -1,18 +1,8 @@
 package factors
 
-// TotativeRatio calculates the fraction of numbers that
+// Totient calculates the number of numbers less than n that
 // are totatives of n (share no factors with n)
-func TotativeRatio(n uint) float64 {
-	if n == 0 {
-		panic("0 has no totative ratio!")
-	}
-
-	return float64(TotativeCount(n)) / float64(n)
-}
-
-// TotativeCount calculates the number of numbers less than n that
-// are totatives of n (share no factors with n)
-func TotativeCount(n uint) uint {
+func Totient(n uint) uint {
 	if n == 0 {
 		return 0
 	}