The projective linear group, denoted as \( \text{PGL}(n, F) \), is a fundamental concept in algebraic geometry and linear algebra. It is defined as the group of linear transformations of a projective space, and its structure relates closely to the field \( F \) over which the vectors are defined. Here's a more detailed explanation: ### Definition 1.
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TODO motivation. Motivation. Motivation. Motivation. The definitin with quotient group is easy to understand.