Frases de Richard Hamming

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Richard Hamming

Data de nascimento: 11. Fevereiro 1915
Data de falecimento: 7. Janeiro 1998

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Richard Wesley Hamming foi um matemático estadunidense.

Suas contribuições na ciência da computação incluem o Código de Hamming , a Janela Hamming , Números Hamming, Pacotes de esfera ou Desigualdade de Hamming e a Distância Hamming.

Formou-se pela Universidade de Chicago em 1937, com mestrado em 1939 pela Universidade de Nebrasca e finalmente Ph.D. pela Universidade de Illinois em Urbana-Champaign em 1942. Foi professor na Universidade de Louisville durante a Segunda Guerra Mundial, que deixou para trabalhar no Projeto Manhattan em 1945, programando um dos primeiros computadores eletrônicos digitais que calculava a solução de equações dos físicos do projeto. O objetivo do programa era descobrir se a detonação de uma bomba atômica poderia incendiar a atmosfera terreste. O programa mostrou que isto não ocorreria, possibilitando o seu uso.

De 1946 a 1976 trabalhou nos Laboratórios da Bell Telephone onde colaborou com Claude Shannon. Em 1976 muda-se para a Naval Postgraduate School, onde foi professor adjunto até 1997 quando se tornou professor emérito.

Foi um dos fundadores e presidente da Association for Computing Machinery.

Citações Richard Hamming

„In the face of almost infinite useful knowledge, we have adopted the strategy of "information regeneration rather than information retrieval." ...most importantly, you should be able to generate the result you need even if no one has ever done it before you“

— Richard Hamming
Context: In the face of almost infinite useful knowledge, we have adopted the strategy of "information regeneration rather than information retrieval."... most importantly, you should be able to generate the result you need even if no one has ever done it before you—you will not be dependent on the past to have done everything you will ever need in mathematics.

„Only when field maintenance is part of the original design can it be safely controlled“

— Richard Hamming
Context: The more complex the designed system the more field maintenance must be central to the final design. Only when field maintenance is part of the original design can it be safely controlled... This applies to both mechanical things and to human organizations.

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„Science is supposed to be cumulative, not almost endless duplication of the same kind of things.“

— Richard Hamming
Context: Indeed, one of my major complaints about the computer field is that whereas Newton could say, "If I have seen a little farther than others, it is because I have stood on the shoulders of giants," I am forced to say, "Today we stand on each other's feet." Perhaps the central problem we face in all of computer science is how we are to get to the situation where we build on top of the work of others rather than redoing so much of it in a trivially different way. Science is supposed to be cumulative, not almost endless duplication of the same kind of things.

„Euclid's postulates came from the Pythagorean theorem, not the other way around.“

— Richard Hamming
Context: The idea that theorems follow from the postulates does not correspond to simple observation. If the Pythagorean theorem were found to not follow from the postulates, we would again search for a way to alter the postulates until it was true. Euclid's postulates came from the Pythagorean theorem, not the other way around.

„When a theory is sufficiently general to cover many fields of application, it acquires some "truth" from each of them.“

— Richard Hamming
Context: When a theory is sufficiently general to cover many fields of application, it acquires some "truth" from each of them. Thus... a positive value for generalization in mathematics.

„Are you sure you are not merely "programmed" in life by what by chance events happens to you?“

— Richard Hamming
Context: When you take a course in Euclidean geometry is not the teacher putting a... learning program into you?... You enter the course and cannot do problems; the teacher puts into you a program and at the end of the course you can solve such problems.... Are you sure you are not merely "programmed" in life by what by chance events happens to you?

„In science if you know what you are doing you should not be doing it.
In engineering if you do not know what you are doing you should not be doing it.“

— Richard Hamming
Context: In science if you know what you are doing you should not be doing it. In engineering if you do not know what you are doing you should not be doing it. Of course, you seldom, if ever, see either pure state.<!-- (1997), p. 5

„We do not always know what we are talking about.“

— Richard Hamming
Context: We do not always know what we are talking about.... Troubles... can be made to arise whenever what is being said includes itself—a self-referral situation.

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„Until we understand languages of communication involving humans as they are then it is unlikely many of our software problems will vanish.“

— Richard Hamming
Context: The fundamentals of language are not understood to this day.... Until we understand languages of communication involving humans as they are then it is unlikely many of our software problems will vanish.

„The newer aspects of many fields start with the admission of uncertainty.“

— Richard Hamming
Context: Probability plays a central role in many fields, from quantum mechanics to information theory, and even older fields use probability now that the presence of "noise" is officially admitted. The newer aspects of many fields start with the admission of uncertainty.

„He who works with the door open gets all kinds of interruptions, but he also occasionally gets clues as to what the world is and what might be important.“

— Richard Hamming
Context: I noticed the following facts about people who work with the door open or the door closed. I notice that if you have the door to your office closed, you get more work done today and tomorrow, and you are more productive than most. But 10 years later somehow you don't quite know what problems are worth working on; all the hard work you do is sort of tangential in importance. He who works with the door open gets all kinds of interruptions, but he also occasionally gets clues as to what the world is and what might be important.

„The assumptions and definitions of mathematics and science come from our intuition“

— Richard Hamming
Context: The assumptions and definitions of mathematics and science come from our intuition, which is based ultimately on experience. They then get shaped by further experience in using them and are occasionally revised. They are not fixed for all eternity.

Publicidade

„If you believe too much you'll never notice the flaws; if you doubt too much you won't get started. It requires a lovely balance.“

— Richard Hamming
Context: Most people like to believe something is or is not true. Great scientists tolerate ambiguity very well. They believe the theory enough to go ahead; they doubt it enough to notice the errors and faults so they can step forward and create the new replacement theory. If you believe too much you'll never notice the flaws; if you doubt too much you won't get started. It requires a lovely balance.

„They are not fixed for all eternity.“

— Richard Hamming
Context: The assumptions and definitions of mathematics and science come from our intuition, which is based ultimately on experience. They then get shaped by further experience in using them and are occasionally revised. They are not fixed for all eternity.

„Without continuous mathematics, the study of discrete mathematics soon becomes trivial and very limited. ...The two topics“

— Richard Hamming
Context: Increasingly... the application of mathematics to the real world involves discrete mathematics... the nature of the discrete is often most clearly revealed through the continuous models of both calculus and probability. Without continuous mathematics, the study of discrete mathematics soon becomes trivial and very limited.... The two topics, discrete and continuous mathematics, are both ill served by being rigidly separated.

„Rigor is not a yes-no property of a proof... it is a vague standard of careful treatment that is currently acceptable to a particular group.“

— Richard Hamming
Context: When you yourself are responsible for some new application in mathematics... then your reputation... and possibly even human lives, may depend on the results you predict. It is then the need for mathematical rigor will become painfully obvious to you.... Mathematical rigor is the clarification of the reasoning used in mathematics.... a closer examination of the numerous "hidden assumptions" is made.... Over the years there has been a gradually rising standard of rigor; proofs that satisfied the best mathematicians of one generation have been found inadequate by the next generation. Rigor is not a yes-no property of a proof... it is a vague standard of careful treatment that is currently acceptable to a particular group.

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