TY - GEN
T1 - Depth-3 arithmetic formulae over fields of characteristic zero
AU - Shpilka, Amir
AU - Wigderson, Avi
PY - 1999
Y1 - 1999
N2 - In this paper we prove near quadratic lower bounds for depth-3 arithmetic formulae over fields of characteristic zero. Such bounds are obtained for the elementary symmetric functions, the (trace of) iterated matrix multiplication, and the determinant. As corollaries we get the first non-trivial lower bounds for computing polynomials of constant degree, and a gap between the power depth-3 arithmetic formulas and depth-4 arithmetic formulas. The main technical contribution relates the complexity of computing a polynomial in this model to the wealth of partial derivatives it has on every affine subspace of small co-dimension. Lower bounds for related models utilize an algebraic analog of Nechiporuk lower bound on Boolean formulae.
AB - In this paper we prove near quadratic lower bounds for depth-3 arithmetic formulae over fields of characteristic zero. Such bounds are obtained for the elementary symmetric functions, the (trace of) iterated matrix multiplication, and the determinant. As corollaries we get the first non-trivial lower bounds for computing polynomials of constant degree, and a gap between the power depth-3 arithmetic formulas and depth-4 arithmetic formulas. The main technical contribution relates the complexity of computing a polynomial in this model to the wealth of partial derivatives it has on every affine subspace of small co-dimension. Lower bounds for related models utilize an algebraic analog of Nechiporuk lower bound on Boolean formulae.
UR - http://www.scopus.com/inward/record.url?scp=0032644925&partnerID=8YFLogxK
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AN - SCOPUS:0032644925
SN - 0769500757
T3 - Proceedings of the Annual IEEE Conference on Computational Complexity
SP - 87
EP - 96
BT - Proceedings of the Annual IEEE Conference on Computational Complexity
PB - IEEE Comp Soc
T2 - Proceedings of the 1999 14th Annual IEEE Conference on Computational Complexity
Y2 - 4 May 1999 through 6 May 1999
ER -