Projection

Projection, projector, or projective may refer to:

Khan Academy

Khan Academy is a non-profit educational organization created in 2006 by educator Salman Khan with the aim of providing a free, world-class education for anyone, anywhere. The organization produces short lectures in the form of YouTube videos. In addition to micro lectures, the organization's website features practice exercises and tools for educators. All resources are available for free to anyone around the world. The main language of the website is English, but the content is also available in other languages.

History

The founder of the organization, Salman Khan, was born in New Orleans, Louisiana, United States to immigrant parents from Bangladesh and India. After earning three degrees from the Massachusetts Institute of Technology (a BS in mathematics, a BS in electrical engineering and computer science, and an MEng in electrical engineering and computer science), he pursued an MBA from Harvard Business School.

In late 2004, Khan began tutoring his cousin Nadia who needed help with math using Yahoo!'s Doodle notepad.When other relatives and friends sought similar help, he decided that it would be more practical to distribute the tutorials on YouTube. The videos' popularity and the testimonials of appreciative students prompted Khan to quit his job in finance as a hedge fund analyst at Connective Capital Management in 2009, and focus on the tutorials (then released under the moniker "Khan Academy") full-time.

Norman Chan

Norman Chan Tak-Lam, SBS, JP (born 1954), is a Hong Kong banker, treasury official, and civil servant. Chan currently serves as the Chief Executive of the Hong Kong Monetary Authority, a position he has held since on 1 October 2009, following the retirement of his predecessor, Joseph Yam. Chan previously served as Director of the Office of the Chief Executive of the Hong Kong Special Administrative Region and Regional Vice-Chairman of Standard Chartered Bank.

Career

Norman Chan graduated from Queen's College, Hong Kong, followed by earning a degree in the sociology from the Chinese University of Hong Kong. In 1976 Chan entered the Hong Kong Civil Service as an Administrative Officer. By 1991 he was appointed a Deputy Director of Monetary Management at the Exchange Fund of Hong Kong. In 1993 he became the Executive Director of the Hong Kong Monetary Authority at the authority's creation. Chan was promoted to vice president of the Hong Kong Monetary Authority. In December 2005, he became the Vice-Chairman of the Asian region of Standard Chartered Bank. In July 2007, he was appointed as Director of the Office of the Hong Kong Chief Executive. On 17 July 2009, Financial Secretary John Tsang, announced that Norman Chan was to replace Mr. Joseph Yam as the Chief Executive of the HKMA following Joseph Yam's retirement. Chan is compensated with an annual salary of six million Hong Kong dollars.

Linear algebra

Linear algebra is the branch of mathematics concerning vector spaces and linear mappings between such spaces. It includes the study of lines, planes, and subspaces, but is also concerned with properties common to all vector spaces.

The set of points with coordinates that satisfy a linear equation forms a hyperplane in an n-dimensional space. The conditions under which a set of n hyperplanes intersect in a single point is an important focus of study in linear algebra. Such an investigation is initially motivated by a system of linear equations containing several unknowns. Such equations are naturally represented using the formalism of matrices and vectors.

Linear algebra is central to both pure and applied mathematics. For instance, abstract algebra arises by relaxing the axioms of a vector space, leading to a number of generalizations. Functional analysis studies the infinite-dimensional version of the theory of vector spaces. Combined with calculus, linear algebra facilitates the solution of linear systems of differential equations.