add comments

internal/lib/continuedFrac.go

@@ -21,6 +21,9 @@ import (
 	"math/big"
 )
 
+/*
+SqrtRepetend returns the repetend of the continued fraction of sqrt(x). It returns an error if x is a perfect square.
+*/
 func SqrtRepetend(x *big.Int) ([]*big.Int, error) {
 	m := big.NewInt(0)
 	d := big.NewInt(1)
@@ -65,6 +68,9 @@ func cycle(seq []*big.Int) <-chan *big.Int {
 	return ch
 }
 
+/*
+GaussianBrackets returns a channel that outputs the sequence [], [a1], [a1, a2], ... where each value comes from the input channel and [] denotes Gaussian brackets.
+*/
 func GaussianBrackets(ch <-chan *big.Int) <-chan *big.Int {
 	out := make(chan *big.Int)
 
@@ -87,6 +93,9 @@ func GaussianBrackets(ch <-chan *big.Int) <-chan *big.Int {
 	return out
 }
 
+/*
+CFracConvergents returns a channel that outputs convergents of a periodic continued fraction with initial term a0 and repetend stored in denoms.
+*/
 func CFracConvergents(a0 *big.Int, denoms []*big.Int) <-chan *big.Rat {
 	hc := cycle(denoms)
 	_ = <-hc