mathematical tools

Overview: when designing an algorithm, consider two aspects: one is the correctness of the algorithm, and the other is the efficiency of the algorithm, that is, complexity. Generally, we give priority to time complexity, which is also discussed in this article. This problem is often encountered during algorithm learning. Why is the time complexity of fast sorting O (nlog (N ))? Why is the time complexity of insertion sorting O (N ^ 2 )? These are the time complexity of the algorithms we are fami

There are five simple mathematical operators, two of which have two forms: two yuan and one yuan. the following table lists these operators and uses an example to describe their usage and their results when using simple numeric types (integers and floating-point numbers ). Result of the example expression of the operator category + Binary var1 = var2 + var3; the value of var1 is the sum of var2 and var3. -Binary var1 = var2-var3; the value of var1

A mathematical discovery that will spread around the world and be written into all university textbooks Self-selected "beyond the Turing Machine" SeriesArticle:Beyond the Turing Machine (II)-mysterious and infiniteHttp://blog.csdn.net/universee(2) answers to the mysteries of mathematics in the past century In the conto set theory, it is considered that there are no number of infinity. conto obtains a series of infinity, ∞ 0, ∞ 1, ∞ 2… with "The se

1. Preface GSL (GNU Scientific Library) is a library written in C for scientific computing. It has more than 1000 functions. It provides many mathematical computing aspects, most functions of MATLAB can be implemented by using it, which saves a lot of trouble in numerical calculation. Detailed functions of gsl. GSL functions and the introduction of the relevant header files can see this partial article: TTS, GSL document directory translation see here

); returns the absolute value of the plural.7. Standard floating point numberDouble frexp (double F, int * P); Standard floating point number, F = x * 2 ^ P, known f x, P (x between [0.5, 1])Double ldexp (Double X, int P); opposite to frexp, we know that X and P evaluate F8. Integer and remainderDouble MODF (double, double *); returns the integer part of the parameter through the pointer and returns the fractional partDouble fmod (double, double); returns the remainder of the two parameters.9. O

There have been many compilations recently, and it is simply a torment to look at the source code of C ++ code. This forces me to re-use assembly commands to implement all the mathematical libraries. Of course, including detecting cpuid and using Extended Instruction sets. The test result is compared with the d3dx9 mathematical function, and the effect is satisfactory. Except that the matrix multiplication

Linux Shell variables Mathematical operationsAbstract:1) The Linux shell uses let, [], (()) Three operators to manipulate shell variables for simple basic operations;2) The Linux shell uses expr and BC two programs to achieve advanced operations;1, basic operation of Linux shell variablesValues are assigned directly to variables as regular variables and are saved as strings.The 1.1 Let command can be used to perform basic operations directly:When I us

Asymmetric encryption technology, in the current network, has a very wide range of applications. Encryption technology is the basis of digital money.Asymmetric, which means that the algorithm requires a pair of keys, using one (public key) encryption, you need to use another (private key) to decrypt.But for its principle most students should be smattering, today to analyze the classic asymmetric encryption algorithm-RSA algorithm.Through the analysis of this paper, we can better understand the p

Word and MathType can be perfectly compatible, but sometimes when you use MathType to edit a formula in Word, you get a situation where the mathematical symbols that you enter become garbled, how do you solve the problem? The following tutorial explains the problem of MathType mathematical symbols garbled in Word. The specific steps for the workaround are as follows: 1. Double-click the math formula that

Mathematical functions in Javascript are classified into the following mathematical methods: Constans (constant), power functions (multiplication function), trigonometic functions (trigonometric function), rounding functions (rounding function), random numbers (random number) Constants and multiplication Functions Math. E Base of natural logarithm (constant) 2.718 Math. LN10 Natu

binary representation is 0010100110000001 ..., the two are Boolean operation and. The result is 0000100000000001 ..., which indicates that the fifth and 16th articles meet the requirements. The computer does the Boolean operation is very fast, now the cheapest microcomputer in a instruction cycle to do 32-bit Boolean operations, a second can be carried out more than billions of times.Second, the page ranking technologyFor a partial query, the search engine returns tens of thousands of results,

MSSQLSERVER2005 mathematical functions 1. evaluate absolute ABS () selectFWeight-50, ABS (FWeight-50), ABS (-5.38) fromT_Person2. POWER (X, Y) is used to calculate X's y power selectFWeight, POWER (FWeight,-0.5), POWER (FWeight, 2), POWER (FWe mssql server 2005 mathematical functions) 1. Absolute Value ABS () Select FWeight-50, ABS (FWeight-50), ABS (-5.38) from T_Person 2. Power POWER (X, Y) is used to cal

In general, it is the curve around the circle. I have previously written some chapters on the Two-Dimensional Spiral mathematical graphics (1.12) Screw line. This section describes the three-dimensional screw line. in fact, to convert two-dimensional data to three-dimensional data, you only need to add one-dimensional data. the new one-dimensional data can be generated in a variety of ways, so that the thread can be posted on the spherical surface, on

C # mathematical expression Interpreter Test file content: a=2+3*2;b=2*(2+3);Browser button event handler: Private void button_browse_click (Object sender, eventargs e) {openfiledialog FBD = new openfiledialog (); FBD. title = "select a file:"; FBD. checkfileexists = true; FBD. checkpathexists = true; FBD. filter = "*. TXT (Text File) | *. TXT | *. * (all files) | *. * "; FBD. filename = environment. getfolderpath (environment. specialfolder. myco

The hyperbolic parabolic dish is also called the Saddle Surface. Its Equation in the Cartesian coordinate system is: X, Y, and Z are the variables in the direction of the three coordinate axes of the Cartesian coordinate system, and A and B are constants. This article will show several algorithms and cut diagrams for generating a hyperbolic parabolic table. use the script code of the custom syntax to generate a mathematical image. for related soft

This section will show you how to generate a ring and various ring-related graphs, including cyclide surface, Horn torus, and tore de Klein. For related software, see: Mathematical graphics visualization tool. Use script code with custom syntax to generate mathematical graphics. I have previously written a C ++ program for generating a ring. The code is published on the Generation Algorithm of the ring grap