Talk:Method of characteristics

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[edit] Rarefaction

It's not clear (to me) how the description of the solution in a 'rarefaction' as only existing in a weak sense tallies with the normal use of terms in fluid flow. The solution in such area (IIRC) would often be an isentropic self-similar expansion, ie a physically acceptable solution, which is quite well determined. Do mathematicians need to take a paragraph off to educate physicists here? Linuxlad 17:54, 26 June 2006 (UTC)

[edit] What Happened to the Plot?

The article says, "A solution is shown in the figure below as a surface plot and a contour plot". I've checked on two different computers...seems like the plot is gone. Can someone put it back up?

and another thing ... the example is really specific and does not show throughly the method and again can someone add the plot?