A 5/2 n<sup>2</sup>-Lower Bound for the Rank of n×n Matrix Multiplication over Arbitrary Fields.

Markus Bläser A 5/2 n<sup>2</sup>-Lower Bound for the Rank of n×n Matrix Multiplication over Arbitrary Fields. 45-50 1999 FOCS http://computer.org/proceedings/focs/0409/04090045abs.htm db/conf/focs/focs99.html#Blaser99