Abstract: A revolution in telecommunication in India began with installation in 1984 of a  fully digital electronic telephone exchange (RAX) with all the modern facilities at Kittur near Belgaum in Karnataka.

A small random sample of rows/columns of any matrix is a decent proxy for the matrix, provided sampling probabilities are proportional to squared lengths.

Development in the field of Computer Science is very rapid and it also has wide spread impact on society. Use of Information Technology has become an integral part of everyone’s routine.

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