∫ 0 Δ t   t − 3 2       e − 1 t    d t = π   Erfc ( 1 Δ t      )        ( 12  )    MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8akY=wiFfYdH8Gipec8Eeeu0xXdbba9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9s8qqaq=dirpe0xb9q8qiLsFr0=vr0=vr0dc8meaabaqaciaacaGaaeqabaqabeGadaaakeaadaWdXaqaaiabdsha0naaCaaaleqabaGaeyOeI0YaaSaaaeaacqaIZaWmaeaacqaIYaGmaaaaaaqaaiabicdaWaqaaiabfs5aejabdsha0bqdcqGHRiI8aOGaemyzau2aaWbaaSqabeaacqGHsisldaWcaaqaaiabigdaXaqaaiabdsha0baaaaGccqqGKbazcqWG0baDcqGH9aqpdaGcaaqaaGGaciab=b8aWbWcbeaakiabbccaGiabbweafjabbkhaYjabbAgaMjabbogaJnaabmaabaWaaSaaaeaacqaIXaqmaeaadaGcaaqaaiabfs5aejabdsha0bWcbeaaaaaakiaawIcacaGLPaaacaWLjaGaaCzcamaabmaabaGaeGymaeJaeGOmaidacaGLOaGaayzkaaaaaa@51C8@