• 2022-06-09
    证明:若函数[tex=0.643x1.286]yDeddh0uuIG4+CMuFZqEpw==[/tex]在可测集[tex=0.786x1.286]YggwMQ4w3PxfhkmL0NfgdQ==[/tex]上可测,则[tex=1.0x1.286]Il4+Q813I9q8yQmyNS/9CA==[/tex]在[tex=0.786x1.0]I/kNMtd8YcgkWCrgriW/hA==[/tex]上也可测,反之亦真