lim T→∞ 1 2T ∫ −T +T f(t)dt=E[f(t)] MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGe aGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaq Fn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpe WZqaaiqaciWacmGadaGadeaabaGaaqaaaOqaamaaxababaqcLbuaca qGSbGaaeyAaiaab2gaaSqaaiaadsfacqGHsgIRcqGHEisPaeqaaOWa aSaaaeaajugqbiaaigdaaOqaaKqzafGaaGOmaOGaamivaaaadaWdXa qaaiaadAgacaGGOaGaamiDaiaacMcajugqbiGacsgakiaadshacqGH 9aqpcaWGfbGaai4waiaadAgacaGGOaGaamiDaiaacMcacaGGDbaale aacqGHsislcaWGubaabaGaey4kaSIaamivaaqdcqGHRiI8aaaa@5368@