四邊形不等式及其優化決策單調性

四邊形不等式爲 w ( a , d ) + w ( b , c ) > = w ( a , c ) + w ( b , d ) ( a < = b < = c < = d ) w(a , d) + w(b ,c ) >= w(a , c) + w(b , d) (a<=b<=c<=d) w(a,d)+w(b,c)>=w(a,c)+w(b,d)(a<=b<=c<=d)html 當知足 w ( a ,

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