TY - JOUR A1 - Schwarz, Wolfgang T1 - Comparing continuous and discrete birthday coincidences : "Same-Day" versus "Within 24 Hours" N2 - In its classical form the famous birthday problem (Feller 1968; Mosteller 1987) addresses coincidences within a discrete sample space, looking at births that fall on the same calendar day. However, coincidence phenomena often arise in situations in which it is more natural to consider a continuous-time parameter. We first describe an elementary variant of the classical problem in continuous time, and then derive and illustrate close approximate relations that exist between the discrete and the continuous formulations. Y1 - 2010 UR - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/12502 SN - 0003-1305 ER -