特里忒蔡卡方程

特里忒蔡卡方程(Tritzeica equation)是一个最早由罗马尼亚数学家George Tritzeica在1907年在微分几何领域研究的非线性偏微分方程常见于微分几何学和物理学的非线性偏微分方程:

u_{xy}=exp(u_{x,y})-exp(-2*u_{x,y})

作变换w(x, y) = exp(u(x, y))

w(x, y)_{y, x}w(x, y)-w(x, y)_{x}w(x, y)_{y}-w(x, y)^3+1 = 0

求得行波解,再用反代换 u(x,y)=ln(w(x,y))即得 原方程的行波解。

解析解
:u(x, y)=ln( -1/2-(1/2I)\sqrt(3)+(3/4+(3/4I)\sqrt(3))csc(_C1+_C2x+(3/4)(1/2+(1/2I)\sqrt(3))y/_C2)^2)
:u(x, y) =ln( -1/2-(1/2I)\sqrt(3)+(3/4+(3/4I)\sqrt(3))sec(_C1+_C2x+(3/4)(1/2+(1/2I)\sqrt(3))y/_C2)^2)
:u(x, y) =ln( -1/2+(1/2I)\sqrt(3)+(3/4-(3/4I)\sqrt(3))csc(_C1+_C2x+(3/4)(1/2-(1/2I\sqrt(3))y/_C2)^2)
:u(x, y) =ln(1/4-(1/4I)\sqrt(3)+(-3/4+(3/4I)\sqrt(3))coth(_C1+_C2x+(3/4)(-1/2+(1/2I)sqrt(3))y/_C2)^2)
:u(x, y) = ln(1/4-(1/4I)\sqrt(3)+(-3/4+(3/4I)\sqrt(3))tanh(_C1+_C2x+(3/4)(-1/2+(1/2I)sqrt(3))y/_C2)^2)
:u(x, y) =ln( 1/4-(1/4I)\sqrt(3)+(3/4-(3/4I)\sqrt(3))cot(_C1+_C2x+(3/4)(1/2-(1/2I)\sqrt(3))y/_C2)^2)
:u(x, y) =ln( 1/4-(1/4I)\sqrt(3)+(3/4-(3/4I)\sqrt(3))tan(_C1+_C2x+(3/4)(1/2-(1/2I)\sqrt(3))y/_C2)^2)
:w(x, y) = (8/3)_C4^2-(1/3)RootOf(64_C4^6+27-24_C4^4_Z-6_C4^2_Z^2+_Z^3)-4_C4^2JacobiDN(_C2+(1/2)_C4x+_C4t, (1/2)RootOf(-RootOf(64_C4^6+27-24_C4^4_Z-6_C4^2_Z^2+_Z^3)+_Z^2)/_C4)^2

行波图
参考文献

*谷超豪 《孤立子理论中的达布变换及其几何应用》 上海科学技术出版社

*阎振亚著 《复杂非线性波的构造性理论及其应用》 科学出版社 2007年

李志斌编著 《非线性数学物理方程的行波解》 科学出版社

#王东明著 《消去法及其应用》 科学出版社 2002

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