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so this video is to talk about the notion of equation referencing and itamp;#39;s a very useful technique when youamp;#39;re writing a longer article or something like that so what Iamp;#39;ve done at the beginning of this file as I have input the various packages that Iamp;#39;ve used in the previous videos together with the new commands the shortcut commands that I introduced in the video on shortcut commands so then Iamp;#39;m going to begin my document Iamp;#39;m going to start a new paragraph and Iamp;#39;m going to enter a 2x2 matrix a so suppose and then Iamp;#39;m going to use begin equation and end equation in the introductory video I used double dollar signs to create centered equations but for equation referencing itamp;#39;s better to use the begin equation and the end equation commands Iamp;#39;m going to enter a two by two matrix a so to enter a bordered matrix begin B matrix and B matrix and then you list each row separating entries with the and symbol so two a
