# -- * -- Coding: UTF-8 -- * -- import mathimport itertoolsdef mean (t): "mean" Return float (sum (t)/Len (t) def E (X, p): "discretization mathematical expectation (also called mean) of a random variable ): the sum of the product of random variable

It is said that the latest reform of the college entrance examination of the math test occupies an important share, which reminds of why the "society like Mathematics" this education problem. Since mathematics by the public "attention" to such a

Triangular mesh (Triangle mesh)in the simplest case, a polygon mesh is just a list of polygons, and a triangular mesh is a polygon mesh that consists of all triangles. Polygonal and triangular meshes are widely used in graphics and modelling to

Read Catalogue
1. Features of complex networks
2. Community Testing
3. Structural balance
4. Maximizing impact
5. Network communication
6. Supplement
7. References
In our real life, many complex systems can be

(1) indicates "domain Operator"Example: Declares a Class A, Class A declares a member function void F (), but does not give the definition of F in the declaration of the class, so when F is defined outside the class,will be written as void A::f (),

This article mainly introduces some suggestions for reuse and reduction in Python programming, from the IBM official technical documentation. For more information, see
Back to nature
Many popular toys are based on the concept of simple building

Innocence
Many popular toys are based on such a concept: simple building blocks. These simple blocks can be combined in a variety of ways to construct a new piece of work-sometimes even completely unexpected. This concept also applies to real-life

Matrix Revolution-Understanding matricesThe linear algebra course, whether you start from the determinant or directly from the matrix, is riddled with inexplicable beginnings. For example, in the national General Engineering Department of teaching

[C ++ exploration tour] Part 1 Lesson 8: pass value reference, file source
Introduction
1. Part 1Lesson 8:Upload value reference, file source
2. Lesson 9 of the first part: array mighty, dynamic and static Integration
Upload value reference, file

Java interview 30 Question 1: What are the differences between final, finally, and finalize.Second, can anonymous inner class (anonymous internal class) be extends (inherited) other classes, or implements (implemented) interface (Interface )?Third,

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.