In number theory, a Carmichael number is a composite positive integer which satisfies the congruence
for all integers which are relatively prime to (see modular arithmetic). They are named for Robert Carmichael. The Carmichael numbers are the Knödel numbers K1.
Read more about Carmichael Number: Overview, Discovery, Generalizations, Higher-order Carmichael Numbers
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“An impersonal and scientific knowledge of the structure of our bodies is the surest safeguard against prurient curiosity and lascivious gloating.”
—Marie Carmichael Stopes (1880–1958)
“If we remembered everything, we should on most occasions be as ill off as if we remembered nothing. It would take us as long to recall a space of time as it took the original time to elapse, and we should never get ahead with our thinking. All recollected times undergo, accordingly, what M. Ribot calls foreshortening; and this foreshortening is due to the omission of an enormous number of facts which filled them.”
—William James (1842–1910)