(GK 2006/10/24)
</p>
- <li> <p>New: The step-21 tutorial programs is ready. It considers time
+ <li> <p>New: The step-25 tutorial program, demonstrating the
+ solution of the nonlinear sine-Gordon equation (a variant of
+ the time dependent wave equation) has been added.
+ <br>
+ (WB 2006/11/05)
+ </p>
+
+ <li> <p>New: The step-21 tutorial program is ready. It considers time
dependent two-phase flow through a porous medium.
<br>
(WB 2006/10/30)
</dd>
<dt>
- <strong>2006/10/03: step-23/24 are finished</strong>
+ <strong>2006/10/03: step-23/24/25 are finished</strong>
</dt>
<dd>
- The step-23 and step-24 tutorial programs have been added,
- demonstrating how to solve the time dependent wave equation.
+ The step-23, step-24 and step-25 tutorial programs have been added,
+ demonstrating how to solve the time dependent wave equation
+ and a nonlinear variant of it, the sine-Gordon equation.
</dd>
<dt>
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