考虑下述带位移的广义Riemann边值问题Φ+[α( t)]=G1( t)Φ-( t)+G2( t)Φ-( t)+f( t),( t∈L),边界L为简单封闭的Lyapunov曲线,并将复平面C分隔为内域D+和外域D-两部分。正位移或反位移α( t)是曲线L至它自身的同胚变换,且系数满足G1(t), G2(t), f(t),α′(t)∈Hμ(t)。讨论当G1(t)±G2(t)之一为常数时,求解并给出了上述问题的封闭形式解,从而得到比前人更好的结果。最后,通过一个实例,验证了求解过程及封闭形式解的正确性。
In this paper the generalized Riemann boundary value problem with shift Φ+[α( t) ] =G1(t)Φ-(t) +G2(t)Φ-(t) +f(t), (t∈L), is investigated in the class of piecewise analytic func-tions.The boundary L is a simple closed Lyapunov curve in complex plane C, let D+be the interior domain , and D-=C/D+,α( t) is a homeomorphism onto itself which preserves or changes the orien-tation of L, the coefficients G1(t), G2(t), f(t),α′(t) belong to Hμ(t).When one case of G1(t) ±G2 ( t)≡const is satisfied , the paper establishes the closed form of the solution of problem above , which is better than some past works .Finally, an example is given to verify the correctness of the solu-tion process and the closed form solution .