goreq(KurumiValue other) { return(other.lthan_number(this).negation()); }
lthan(KurumiValue other) { return(other.lthan_number(this)); }
goreq(KurumiValue other) { return(other.lthan_number(this).negation()); }
lthan(KurumiValue other) { return(other.lthan_number(this)); }