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Oct 26, 2015 at 21:43 vote accept MarcosDNMaia
Oct 26, 2015 at 21:42 comment added MarcosDNMaia That's it! Thanks for your response.
Oct 26, 2015 at 21:30 comment added Dima Pasechnik so you see, the laplacian has one eigenvalue 0, and 2 conjugate complex eignevalues, each with multiplicity 3.
Oct 26, 2015 at 21:28 comment added Dima Pasechnik sure, see the edited answer
Oct 26, 2015 at 21:28 history edited Dima Pasechnik CC BY-SA 3.0
addded the matrix for the example
Oct 26, 2015 at 21:12 comment added MarcosDNMaia Can you paste here the Laplacian matrix for the example you gave?
Oct 25, 2015 at 22:09 history answered Dima Pasechnik CC BY-SA 3.0