diff --git a/semester3/numcs/parts/interpolation.tex b/semester3/numcs/parts/interpolation.tex
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+\newsection
+\section{Interpolation}
diff --git a/semester3/numcs/parts/introduction/matrix-multiplication.tex b/semester3/numcs/parts/introduction/matrix-multiplication.tex
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diff --git a/semester3/numcs/parts/introduction/rounding-errors.tex b/semester3/numcs/parts/introduction/rounding-errors.tex
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diff --git a/semester3/numcs/parts/introduction/time-complexity.tex b/semester3/numcs/parts/introduction/time-complexity.tex
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