compute convergents with channels

cmd/pell.go

@@ -39,16 +39,13 @@ func pell(cmd *cobra.Command, args []string) {
 		cobra.CheckErr(pellCoeff + " is a perfect square")
 	}
 
-	hprev := big.NewInt(0)
-	kprev := big.NewInt(1)
+	hch := make(chan *big.Int)
+	kch := make(chan *big.Int)
+	go gaussianBrackets(a0, big.NewInt(1), repetend, hch)
+	go gaussianBrackets(big.NewInt(1), big.NewInt(0), repetend, kch)
 
-	h := big.NewInt(1)
-	k := big.NewInt(0)
-
-	gaussianBrackets(h, hprev, a0)
-	gaussianBrackets(k, kprev, a0)
-
-	for i := 0; true; i = (i + 1) % len(repetend) {
+	for {
+		h, k := <-hch, <-kch
 		foo := new(big.Int).Exp(k, big.NewInt(2), nil)
 		foo.Mul(d, foo)
 
@@ -58,10 +55,6 @@ func pell(cmd *cobra.Command, args []string) {
 		if bar.Cmp(big.NewInt(1)) == 0 {
 			fmt.Println(h, k)
 		}
-
-		a := repetend[i]
-		gaussianBrackets(h, hprev, a)
-		gaussianBrackets(k, kprev, a)
 	}
 }