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- 20.04.2013, 14:52. Лопотам в теме
... воображаемых друзей нормальный шаг я человек они люди problems или у вас таки совсем очевидно прорезался...
- 17.10.2012, 21:31. Лопотам в теме
problems или красиво обобщать без доказательств у нас...
- 29.02.2012, 11:13. Наталья Остапенко в теме
«Роль в Microsoft для выпускников 2011 - 2012 гг»
... with microsoft s vision and how to solve business problems with microsoft solutions understanding of...
- 01.02.2012, 19:09. Лопотам в теме
«Кто к Макфолу не ходил - тот сурковская пропаганда!»
problems мне нравится свежий воздух и близко расположенный...
- 02.09.2011, 22:01. AlexKuk в теме
«Встреча LUG-а в сентябре 2011 (для первокурсников)»
... этой темой http projecteuler net index php section problems id 59 http projecteuler net index php section...
- 07.08.2011, 11:31. VAL в теме
«Пять нерешенных проблем и четыре сверхзадачи науки»
... замечательная книга уиггинс а уинн ч the five biggest unsolved problems in science arthur w wiggins charles m wynn...
- 11.11.2010, 01:06. Chameleon в теме
«Maxima на Corum'е»
... based mathematics is crucial for attacking the many problems which literally cannot be solved by pencil and paper methods in many cases problems which would take years by hand can be reduced to seconds by powerful computers also in the course of a long derivation it is sometimes useful for those who have already mastered the fundamentals to do work in these systems as a guard against careless errors or a faster means than a table of deriving some particular result also in case of an error fixing the resulting error can often be much quicker and simpler courtesy of a mathematical notebook which can be reevaluated with the correct parameters in place but just as a computer can guard against human error the human must not trust the computer unquestioningly all of these systems have limits and when those limits are reached it is quite possible for bizarre errors to result or in some cases answers which are actually wrong to say nothing of the fact that the people who programmed these systems were human and make mistakes to illustrate the limits of computer algebra systems we take the following example when given the integral integrate 1 sqrt 2-2 cos x from x -pi 2 to pi 2 mathematica 4 1 gives with no warnings 2 log 4 2 log cos pi 8 2 log sin pi 8 which n evalutates numerically to give 1 00984 maxima 5 6 returns the integral unevaluated the commercial macsyma says the integral is divergent and maple 7 says infinity cite maxima email list here had the person who wished to learn the result blindly trusted most of the systems in question he might have been misled so remember to think about the results you are given the computer is not always necessarily right and even if it gives a correct answer that answer is not necessarily complete a brief history of macsyma the birthplace of macsyma where much of the original coding took place was project mac at mit in the late 1960s and earlier 1970s projectmac was an mit research unit which was folded into the current laboratory for computer science research support for macsyma included the advanced research projects agency arpa department of defense the us department of energy and other government and private sources the original idea first voiced by marvin minsky was to automate the kinds of manipulations done by mathematicians as a step toward understanding the power of computers to exhibit a kind of intelligent behavior the undertaking grew out of a previous effort at mitre corp called mathlab work of carl engelman and others plus the mit thesis work of joel moses on symbolic integration and the mit thesis work of william a martin the new effort was dubbed macsyma project mac s symbolic manipulator the original core design was done in july 1968 and coding began in july 1969 this was long before the days of personal computers and cheap memory initial development was centered around a single computer shared with the artificial intelligence laboratory a dec pdp-6 this was replaced by newer more powerful machines over the years and eventually the mathlab group acquired its own dec-pdp-10 mit-ml running the its operating system this machine became a host on the early arpanet predecessor to the internet which helped it gain a wider audience as the effort grew in scope and ability the general interest it created led to attempts to port the code that is to take the series of instructions which had been written for one machine and operating system and adapt them to run on another different system the earliest such effort was the running of macsyma in a maclisp environment on a ge honeywell multics mainframe another system at mit the multics environment provided essentially unlimited address space but for various reasons the system was not favored by programmers and the multics implementation was never popular the next effort came about when a group at mit designed and implemented a machine which was based on the notion that hardware support of lisp would make it possible to overcome problems that inhibited the solution of many interesting problems the lisp machine clearly had to support macsyma...
- 03.09.2010, 22:53. George в теме
«Спортивное программирование - 2010/11»
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- 22.02.2010, 15:21. mrAndersen в теме
... it or you will experience stability and corruption problems correctly functioning ram has no errors even...
- 23.12.2009, 20:25. ramzai в теме
«Школа Microsoft по структурам данных и алгоритмам»
... case studies the traveling salesman and bin packing problems clifford stein columbia university usa combinatorial...