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05995257 Grenet, Bruno Kaltofen, Erich L. Koiran, Pascal Portier, Natacha Symmetric determinantal representation of formulas and weakly skew circuits. Gurvits, Leonid (ed.) et al., Randomization, relaxation, and complexity in polynomial equation solving. Banff International Research Station workshop on randomization, relaxation, and complexity, Banff, Ontario, Canada, February 28--March 5, 2010. Providence, RI: American Mathematical Society (AMS) (ISBN 978-0-8218-5228-6/pbk). Contemporary Mathematics 556, 61-96 (2011). 2011 Providence, RI: American Mathematical Society (AMS) EN