I analyze data using a spreadsheet software.

The time complexity of this algorithm is O(n).

The space complexity of this algorithm is O(n).

A positive-definite matrix is an important concept in linear algebra.

In linear algebra, the upper triangular matrix plays a very important role.

A diagonal matrix is a matrix in which all elements outside the main diagonal are zero.

A lower triangular matrix is a matrix where all the elements below the main diagonal are zero.

He is an expert in computational linguistics and is involved in the development of artificial intelligence.

A positive-semidefinite matrix is one of the important concepts in linear algebra.