transfinite induction

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is-pass:The process of fractional differentiation of several different denominators into the same denominator as the original fraction, called-pass.If you want to add and subtract two fractions, it's best to make him the same two points in the denominator for easy calculation.At this point you can find the least common multiple of the denominator of the two scores, and then there is a way to do it.Mathematical inductive method is a mathematical proof method, which is often used to prove that a

Single-chip microcomputer IO Port standard bidirectional, push-pull, high resistance, open-drain mode, LED induction light off experiment11 Long vacation at home rotten, nothing to do, DIY technology get up!"An experimental study on the working type of the 12C enhanced microcontroller I/O port"Animation video effect Download: STC single-chip head file "51cto--> single-chip microcomputer-->led induction ligh

on the Linux Three Musketeers simple induction:1: awk Exercise 1: Viewing server connection status and summarizing netstat in awk-an|awk'/^tcp/{++s[$NF]}end{for (a in s) print A,s[a]}'established1LISTEN -Exercise 2: Statistics of Web log access traffic, requests for output visits, page or picture requests, total size of each request, total access traffic size summary awk'{a[$7]+=$10;++b[$7];total+=$10}end{for (x in a) print b[x],x,a[x]| " Sort-rn ";p

Author: vamei Source: http://www.cnblogs.com/vamei welcome reprint, please also keep this statement. Thank you! Mathematical induction Mathematical induction)It is a mathematical proof method. It is often used to prove that a proposition (a description of a phenomenon) is valid within the range of natural numbers. With the development of modern mathematics, the proof within the range of natural numbe

Mathematical theorem proof and ComputerAlgorithmThe analogy between designs can provide an excellent method for algorithm design. By interpreting this method, we can understand this key idea and have a deeper understanding of it. This articleArticleA mathematical induction-based method is presented during the design and teaching of composite algorithms. Although this method does not cover all possible methods when designing algorithms, however, it c

each vertex is at least N. If n = 1, there is only one edge connecting two vertices, which is an optimal match. Assume that n> 1 does not have such an optimal match. Considering that the maximum matching M belongs to E. It is assumed that | M | Insert graph 6 At first glance, it seems that this proof does not produce an algorithm, because the proof starts from a maximum match. Once we know how to find such a match, we can solve this problem. However, the use of the reverse identification

Link: http://blog.csdn.net/jj12345jj198999/article/details/6624864 The basic situation is very simple. If there is only one item of K size, there is a solution. If there is a solution to P (n-1, k), that is to say, if there is a way to put n-1 items into a backpack, we can do it. We only need to simply not use the nth item. However, if there is no solution to P (n-1, k), can we use this negative conclusion? The answer is yes, which means that the nth item must be included. In this case, the rem

#-*-coding:utf-8-*-"""multi-threaded simultaneous Read Queue summary: 1. Blocks if self._jobq.qsize () > 0 into logic, at which time the data is taken out by other threads, and 2 is blocked in data = Self._jobq.get (). Need to learn to lock the use Logic: * Main Line Chengti go to queue write all data * sub-thread reads queue data without exiting thread"""ImportQueueImportThreadingImport TimeImportRANDOMQ= Queue.queue (0)#Infinite-size queuesNum_workers = 3#Number of ThreadsclassMyThread (Thread

:04,1536397384.349605:main 3604,2692,103:04,1536397384.350838:sub begin 360403:04,1536397384.350939:main Threads03:04,1536397384.351009:sub 3604,2692,203:04,1536397384.351310:main 3604,2692,203:04,1536397384.352097:main End03:09,1536397389.357353:sub 3604,2692,203:09,1536397389.358372:sub End 3604----------------------------------------------------------Output Interpretation: The middle output portion of the yellow mark, which is very fast during the start of the sub-thread, indicates t

columns, with spaces between each column. 1th column: Test, which represents the user name The 2nd Column: psts/0, represents pseudo terminal or virtual terminal, the concrete manifestation is you open a terminal, this terminal is called pts/0, if you open a terminal again, this new terminal is called PTS/1 For example: Open the first session window (PST/1), the Second session window (PST/2), then close the second session window, then open the second session (PST/2), and open