def Topology_Row(self,r):
        elements=[]
        for s in range(0,self.M):
            elements.append([r,s])

        return elements

    def Topology_Column(self,s):
        elements=[]
        for r in range(0,self.M):
            elements.append([r,s])

        return elements

    def Topology_Box(self,r,s):

        br=r/self.N
        bs=s/self.N
        
        elements=[]
        for r in range(0,self.N):
            rr=br*self.N+r
            
            for s in range(0,self.N):
                ss=bs*self.N+s
                elements.append([rr,ss])

        return elements
    
    def Topology_Elements(self):
        elements=[]
        for r in range(0,self.M):
            for s in range(0,self.M):
            elements.append([r,s])

        return elements