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Timeline for When is this matrix singular?

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S Feb 24, 2014 at 15:51 history suggested Hans CC BY-SA 3.0
Minor clarification.
Feb 24, 2014 at 15:40 review Suggested edits
S Feb 24, 2014 at 15:51
Feb 24, 2014 at 12:04 comment added Lev Borisov Not at the moment. I again suggest trying $2x2$ case. But it may well be something more complicated. The same goes for more complicated $t_k$.
Feb 24, 2014 at 4:42 comment added Hans Fabulous! Do you have any idea how to deal with $\phi_j\neq 0$?
Feb 24, 2014 at 2:09 history edited Lev Borisov CC BY-SA 3.0
edited body
Feb 24, 2014 at 1:55 history answered Lev Borisov CC BY-SA 3.0