SINGULAR Examples

C is given by the 2x2-minors of the matrix: over C[[x,y,z,u,v]].
`LIB "deform.lib"; ring r=0,(x,y,z,u,v),ds; matrix m[2][4]=x,y,z,u,y,z,u,v; ideal f0=minor(m,2);`


          versal(f0);
	      


  
    
          
        ==>
      
    
          
         // Result belongs to ring Px. 

     // Equations of total space of miniversal deformation are 

     // given by Fs, equations of miniversal base space by Js. 

     // Make Px the basering and list objects defined in Px by 

     // typing: 

        setring Px; show(Px); 
      
    
  


	      setring Px;
	      

	      Js;
	      


  
    
          
        ==>
      
    
          
         Js[1,1]=BD
	      

	 Js[1,2]=AD-D2
	      

	 Js[1,3]=-CD

Lille, 08-07-02 http://www.singular.uni-kl.de