User:Ilyakiba

Five things I learned from wikipedia/wikiversity:


 * 1) Wikipedia is a content free website. Anyone can participate and the goal is to create a complete, accurate and neutral encyclopedia with multiple languages.
 * 2) Wikipedia is hosted by the Wikimedia Foundation, a non-profit organization that also hosts a range of other projects.
 * 3) Wikipedia's sister projects: Commons,Wikinews,Wiktionary,Wikiquote,Wikibooks,Wikisource,Wikispecies,Wikiversity,Meta-Wiki.
 * 4) Wikiversity is a project of the Wikimedia Foundation. It is a centre for the creation and use of free learning materials and activities. Free education resources and scholarly projects are hosted.
 * 5) Wikiversity is devoted to learning resources, learning projects, and researching for use in all levels, types of education from pre-school to university, including professional training and informal learning. Teachers,  students, and researchers are invited to join to create open educational resources and collaborative learning communities.

Some Complicated math formula:

Vector Notation: The lower case letters a-h, l-z denote scalars. Uppercase bold A-Z denote vectors. Lowercase bold i, j, k denote unit vectors. denotes a vector with components a and b. denotes vector with n components of which are x1, x2, x3, ..,xn. |R| denotes the magnitude of the vector R.


 * | = magnitude of vector = sqrt(a 2+ b 2)


 * | = sqrt(x12+ .. + xn2)

 +  = 

 + = < x1+y1, .., xn+yn>

k  = 

k  = 

 . = ac + bd

 .<y1, ..,yn> = x1 y1 + .. + xn yn>

R. S= |R| |S| cos theta(theta = angle between them)

R. S= S. R

(a R). (bS) = (ab) R. S

R. (S + T)= R. S+ R. T

For nicer math formulas, see w: Help:Displaying_a_formula.