Related to Breather $K=-1$ ; has the the Wiki Ref a spelling mistake?
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2It's the Sine-Gordon equation. – Matthew Cassell Feb 07 '18 at 15:00
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Thanks, next how to notify this to Wiki? – Narasimham Feb 07 '18 at 15:47
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3@Narasimham: You just edit to correct mistakes that you find. That's the point of Wikipedia – anyone can contribute! – Hans Lundmark Feb 07 '18 at 15:49