Bulletin – September 2017 Equation (A6)

u t * = u t1 * + ε t u * MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=xfr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyDamaaDaaaleaacaWG0baabaGaaiOkaaaakiabg2da9iaadwhadaqhaaWcbaGaamiDaiabgkHiTiaaigdaaeaacaGGQaaaaOGaey4kaSIaeqyTdu2aa0baaSqaaiaadshaaeaacaWG1bWaaWbaaWqabeaacaGGQaaaaaaaaaa@43D7@