[petsc-users] symmetric matrix

[Eleni Siampli]

Hello all,
Lets say that I have a square Mat A, nxn and is upper triangular. The rest elements are 0.for example: lets say that I have a matrix 3x3 : [5 7 8;0 9 1;0 0 2]What I want is to take the symmetric matrix: [5 7 8;7 9 1;8 1 2]I think that I have to use MatCreateSeqSBAIJ(), but I don't understand exactly how can I use it.What is the block?

Thank you in advance,Helen 		 	   		  
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