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On FlashcardExchange.com, users had to pay to print and download flashcards, but all functionality on Cram is free. [2] Flashcards can be created in a number of languages, such as English, French, Spanish, German, Chinese, Polish, and Portuguese. [4] Flashcards are placed into categories, including careers, language, computers, and others. [4]
CK-12 was established in 2007 by Neeru Khosla and Murugan Pal as a not-for-profit educational organization. [5] Teacher-generated content was initially made available under Creative Commons Attribution licenses so as to make it simpler, easier, and more affordable for children to access educational resources.
Algebra is the branch of mathematics that studies certain abstract systems, known as algebraic structures, and the manipulation of expressions within those systems. It is a generalization of arithmetic that introduces variables and algebraic operations other than the standard arithmetic operations, such as addition and multiplication.
Modules of this type are called free and if R has invariant basis number (e.g. any commutative ring or field) the number n is then the rank of the free module. If M n ( R ) is the ring of n × n matrices over a ring R , M is an M n ( R )-module, and e i is the n × n matrix with 1 in the ( i , i ) -entry (and zeros elsewhere), then e i M is an ...
In mathematics, an algebraic function is a function that can be defined as the root of an irreducible polynomial equation.Algebraic functions are often algebraic expressions using a finite number of terms, involving only the algebraic operations addition, subtraction, multiplication, division, and raising to a fractional power.
The test for Grades 9-12 covers algebra I and II, geometry, trigonometry, math analysis, analytic geometry, pre-calculus, and elementary calculus. For Grades 6-8 each school may send up to three students per division. In order for a school to participate in team competition in a division, the school must send three students in that division.
Every polynomial ring R[x 1, ..., x n] is a commutative R-algebra. In fact, this is the free commutative R-algebra on the set {x 1, ..., x n}. The free R-algebra on a set E is an algebra of "polynomials" with coefficients in R and noncommuting indeterminates taken from the set E. The tensor algebra of an R-module is naturally an associative R ...
Wallpaper Symmetry is a free online JavaScript drawing tool supporting the 17 groups. The main page has an explanation of the wallpaper groups, as well as drawing tools and explanations for the other planar symmetry groups as well. TALES GAME, a free software designed for educational purposes which includes the tessellation function.