Home | 18.01 | Chapter 3 | Section 3.1

Tools    Index    Up    Previous    Next


Comment

The equation is not correct when Du = 0.

The left side is 0 when y is a function of u, since at such points u is unchanged.

The right side is undefined, having a "removable discontinuity" there.

We can resolve this problem by defining the right side to be 0 whenever this occurs.

The argument given then hold ( , the problem is not significant; if then as well.)