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| rev | Bot | (Created page with "<div class="d-none"><math> \newcommand{\mathds}{\mathbb}</math></div>Fill in all the geometric details in the basic theory of the determinant, by using the same type of arguments as those in the proof of <math display="block"> \det\begin{pmatrix}a&b\\c&d\end{pmatrix}=ad-bc </math> which was fully proved in the above, namely geometric manipulations, and Thales.") | Apr 20'25 at 1:29 | +363 |