MathSciNet bibliographic data MR2188132 (2006j:68034) 68Q17 (65F05 68W30) Landsberg, J. M. The border rank of the multiplication of $2\times2$$2\times2$ matrices is seven. J. Amer. Math. Soc. 19 (2006), no. 2, 447–459. Article

For users without a MathSciNet license , Relay Station allows linking from MR numbers in online mathematical literature directly to electronic journals and original articles. Subscribers receive the added value of full MathSciNet reviews.

 American Mathematical Society 201 Charles Street Providence, RI 02904-6248 USA