2.How satisfied a patient is with their healthcare tends to depend on the match between their preferences and their doctor’s style of care, or the doctor-patient congruence.
3.Number Theory Gauss's love affair with number theory commenced with his magnum opus, " Disquisitiones Arithmeticae" , published in 1801. In this seminal work, he established a systematic foundation for number theory and introduced important concepts such as congruence of numbers.