Initial commit

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

common/maths/maths.go

@@ -0,0 +1,31 @@
+package maths
+
+import (
+	"fmt"
+	"math/rand"
+	"sort"
+)
+
+func copyslice(input Float64Data) Float64Data {
+	s := make(Float64Data, input.Len())
+	copy(s, input)
+	return s
+}
+
+func sortedCopyDif(input Float64Data) (copy Float64Data) {
+	if sort.Float64sAreSorted(input) {
+		return input
+	}
+	copy = copyslice(input)
+	sort.Float64s(copy)
+	return
+}
+
+func RandDigits(n uint) string {
+	s := ""
+	for n != 0 {
+		s += fmt.Sprintf("%d", rand.Intn(10))
+		n--
+	}
+	return s
+}