ERRATUM

On zero-curvature representations of partial differential equations
by M. Marvan, Opava

Received 23 December 1995



The following table shows some regrettable typing errors admitted in 
the printed version:

|  p. |  l. |        incorrect        |     to be replaced by      |
|-----+-----+-------------------------+----------------------------|
| 103 | +11 | for m > 3 we prove      | for m > 2 we prove         |
|-----+-----+-------------------------+----------------------------|
| 119 |  -9 | P_m = 0                 | P_{m-1} = 0                |
|-----+-----+-------------------------+----------------------------|
| 121 |  +8 | D_{xy} r                | D_{xy} r                   |
|     |     |  + 2 b_{12} a_{21} r    |  + 2 b_{12} a_{21} r       |
|     |     |  - g'r = 0              |  + a{12} r - g'r = 0       |
|-----+-----+-------------------------+----------------------------|
| 121 | +10 | -2 a_{21} D_y r         | -2 D_x r - 2 a_{21} D_y r  |
|     |     |  - 2 r D_y a_{21}       |  - 2 r D_y a_{21}          |
|     |     |  - 4 r b_{11} a_{21}    |  - 4 r b_{11} a_{21}       |
|     |     | = 0                     | = 0                        |
|-----+-----+-------------------------+----------------------------|
| 121 | -17 | B = \pmatrix            | B = \pmatrix               |
|     |     |  \frac12 c u_y & M/K \\ |  -\frac12 c u_y & M/K \\   |
|     |     |  1 & -\frac12 c u_y     |  1 & \frac12 c u_y         |
|     |     | \endpmatrix             | \endpmatrix                |
|-----+-----+-------------------------+----------------------------|
| 121 |  -7 | I.N. Berstein           | I.N. Bernstein             |

The e-mail address  marvan@adelard.dcs.muni.cs  is no longer valid.
Current address is:

      Michal.Marvan@fpf.slu.cz