deletions | additions       diff --git a/Triangular Structure.tex b/Triangular Structure.tex  index e4e5116..f7b90d4 100644  --- a/Triangular Structure.tex  +++ b/Triangular Structure.tex 
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\end{matrix}  \end{equation}  Any number with a solid line of 1's from the top to the centre of the triangle is a factorial number i.e $2,6,24, \dotc$ \dotsc$