diff --git a/algo/ga/population.go b/algo/ga/population.go
index cd72f2a..e4dcd6f 100644
--- a/algo/ga/population.go
+++ b/algo/ga/population.go
@@ -22,8 +22,6 @@ type (
 // PopulationIndividual represents a single population individual.
 type PopulationIndividual struct {
 	CurX DecisionVector
-	CurV DecisionVector
-	CurC ConstraintVector
 	CurF FitnessVector
 
 	BestX DecisionVector
@@ -150,9 +148,7 @@ func (p *Population) Clear() {
 	if p.Population != nil {
 		for _, v := range p.Population {
 			v.CurX = make([]float64, p.Dimen)
-			v.CurC = make([]float64, p.Dimen)
 			v.CurF = make([]float64, p.Dimen)
-			v.CurV = make([]float64, p.Dimen)
 			v.BestX = make([]float64, p.Dimen)
 			v.BestC = make([]float64, p.Dimen)
 			v.BestF = make([]float64, p.Dimen)