Tomorrow, Wednesday 21/2, we quickly ¡­

Tomorrow, Wednesday 21/2, we quickly shall round off the chapter on Tensors, and then discuss material related to Vector Fields and Differential Equations , p. 135-148 in Spivak. In the last message I forgot and wrote in Norwegian. I recommended the problems Ch.III, nr.5,7,12-14,16,19,22, and 23 (Difficult?):