The book Dynamic Programming

The book Dynamic Programming by Richard Bellman is an important, pioneering work in which a group of problems is collected together at the end of some chapters under the heading “Exercises and Research Problems,” with extremely trivial questions appearing in the midst of deep, unsolved problems. It is rumored that someone once asked Dr. Bellman … Read more

Although the cooking of

Although the cooking of food presents some unsolved problems, the quick warming of cooked food and the thawing of frozen food both open up some attractive uses. … There is no important reason why the the housewife of the future should not purchase completely frozen meals at the grocery store just as she buys quick … Read more

The child knows only

The child knows only that he engages in play because it is enjoyable. He isn’t aware of his need to play–a need which has its source in the pressure of unsolved problems. Nor does he know that his pleasure in playing comes from a deep sense of well-being that is the direct result of feeling … Read more

All the more recent

All the more recent work on alkaptonuria has… strengthened the belief that the homogentisic acid excreted is derived from tyrosin, but why alkaptonuric individuals pass the benzene ring of their tyrosin unbroken and how and where the peculiar chemical change from tyrosin to homogentisic acid is brought about, remain unsolved problems. Archibald Garrod