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循环赛名次若干支球队参加单循环比赛,他们两两互相交锋,假设每场比赛只计胜负,且不允许平局.在循环比赛结束后怎样根据他们的比赛成绩排列名次?考虑用点表示球队,胜负用带箭头的弧表示,如1队胜2队,表示为:1••21••26••35••4如图:1胜4场,2,3各胜3场,4,5各胜2场,6队胜1场.2,3名难产,4,5名难产.有向图:在每条边上都标出方向的图.竞赛图:每对顶点之间都有一条边相连的有向图.两个顶点的竞赛图的排名不成问题.三个顶点的竞赛图... 2024-05-151268.24 KB10页
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z=f(x,y)(x0,y0)x,yf(x,y)≤f(x0,y0)(f(x,y)≥f(x0,y0))(x0,y0)f(x0,y0)z=f(x,y)(x0,y0)0000(,)0,(,)0xyfxyfxyz=f(x,y)(x0,y0)(x0,y0)000000(,),(,),(,)xxxyyyAfxyBfxyCfxy0000(,)0,(,)0,xyfxyfxy(1)B2–AC<0,(x0,y0),A<0,(x0,y0)f(x0,y0)A>0,(x0,y0)f(x0,y0).z=f(x,y)(x0,y0)(x0,y0)000000(,),(,),(,)xxxyyyAfxyBfxyCfxy0000(,)0,(,)0,xyfxyfxy(2)B2–AC>0f(x0,y0).(3)B2–AC=0f(x0,y0).0,)... 2024-05-1502.42 MB23页
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